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  Mustangsandmore Forum Archive
  '69 to '73 -- The Musclecar Mustang
  Alex, about your 351C powered '73 Mustang project

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Author Topic:   Alex, about your 351C powered '73 Mustang project
Daniel Jones
Gearhead

Posts: 972
From: St. Louis, MO
Registered: Aug 99

posted 11-28-2005 09:30 AM     Click Here to See the Profile for Daniel Jones        Reply w/Quote
> I just recently did a 351C with 10 to one and a DP intake and
> big carb. Some very mild bowl work and new valves on otherwise
> stock 2V heads. I used a Comp 268H and the thing rips beyond
> our wildest expectations.

Alex, what headers did you run? Also what diameter exhaust?
I'm going to swap out the 302 in dad's '71 Mustang convertible
for a 351C. If I recall correctly, there's a big reinforcement
plate underneath the car that looked like it would limit the
diameter of the exhaust. I've installed subframe connectors and
have an 8" limited slip differential to install. Gears are 3.00:1
behind an AOD. I've got a dished piston/Aussie closed chamber
headed standard bore 4 bolt long block to start with and we'll
likely use a 735 Holley from a 428CJ. It'll be a mild restomod
sort of vehicle and Dad would like it to pull like a 428CJ. On
the suspension side, I've got a set of Global West control arms
for the front and a 3/4" rear bar. We'll need to go to larger
wheels and tires but dad doesn't want to go to stiffer springs
(he's 81 years old and wants to retain a decent ride that doesn't
pound his old bones). Any tips greatly appreciated.

Dan Jones

Moneymaker
Administrator

Posts: 29200
From: Lyons, IL, USA
Registered: May 99

posted 11-28-2005 12:06 PM     Click Here to See the Profile for Moneymaker        Reply w/Quote
Dan, we used out of the box Hooker plated Super Comps for the 2V heads.
Contrary to what it says in the Hooker catalog, they fit just fine with an automatic.
I called the tech line to find out what the issues were and......well, that's another thread altogether.

We are blessed with a killer muffler shop so the exhaust was a piece of cake.
Reducers were cut at 2.5 then new 2.25 head pipes were fabricated with a crossover.
The fit fine (tight) under the re-enforcent plate. They were fed into Magnaflow stainless mufflers in the stock location.
Tail pipes are also 2.25 into OE style Mach 1 chrome tips in stock location.
Sound is fabulous and performance still amazes even me.
Carb is a 770 Holley Avenger 4150 tweaked by me.
Car has 2.75 gears and probably runs 130 MPH.
Suspension was rebuilt to stock specs with the exception of HD KYB gas shocks, poly busings, and a bit larger sway bar.
Ride is smooth and soft, but without any wallowing or plowing.
Handling is exceptional for this size and weight car.
Tires are the new 245-60 Firestone 500 RWL on the OEM sloted 73 wheels.
Everyone that I have taken for a ride in this thing swears that we put a 429/460 in it.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28

The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

Mach won
Gearhead

Posts: 265
From: Walnut Grove, Ca. USA
Registered: Nov 2004

posted 11-28-2005 12:12 PM     Click Here to See the Profile for Mach won        Reply w/Quote
quote:
Originally posted by Daniel Jones:
[
Alex, what headers did you run? Also what diameter exhaust?
I'm going to swap out the 302 in dad's '71 Mustang convertible
for a 351C. If I recall correctly, there's a big reinforcement
plate underneath the car that looked like it would limit the
diameter of the exhaust. I've installed subframe connectors and
have an 8" limited slip differential to install. Gears are 3.00:1
behind an AOD. I've got a dished piston/Aussie closed chamber
headed standard bore 4 bolt long block to start with and we'll
likely use a 735 Holley from a 428CJ. It'll be a mild restomod
sort of vehicle and Dad would like it to pull like a 428CJ. On
the suspension side, I've got a set of Global West control arms
for the front and a 3/4" rear bar. We'll need to go to larger
wheels and tires but dad doesn't want to go to stiffer springs
(he's 81 years old and wants to retain a decent ride that doesn't
pound his old bones). Any tips greatly appreciated.

Dan Jones[/B]


Dan,
on my '71 Mach 1 I used Hedman ceramic coated headers with an X pipe and 2 1/2 exhuast and Flowmasters. The reinforcement plate you mentioned must be unique to the conv.

On the suspension side, I used 620 springs, 1" sway bar in the front, 5 leaf standard eye, no sway bar in the rear with Edelbrock shocks all around. I have also installed subframe connectors as well. I have Total Control upper and lower control arms and strut rods, but have yet to put them on.
With 265/15 tires, the ride is like a 2000 vintage Mustang on smaller jarring bumps, but on large rolling type roads it reverts to the large boat that it is.
Also, the 620 springs along with the Hedmans remove any ground clearance there was. I have to avoid speedbumps.

Daniel Jones
Gearhead

Posts: 972
From: St. Louis, MO
Registered: Aug 99

posted 11-29-2005 08:54 PM     Click Here to See the Profile for Daniel Jones        Reply w/Quote
> Dan, we used out of the box Hooker plated Super Comps for
> the 2V heads. Contrary to what it says in the Hooker catalog,
> they fit just fine with an automatic.

Cool. Thanks.

> Reducers were cut at 2.5 then new 2.25 head pipes were fabricated
> with a crossover. The fit fine (tight) under the re-enforcent
> plate. They were fed into Magnaflow stainless mufflers in the
> stock location. Tail pipes are also 2.25 into OE style Mach 1
> chrome tips in stock location.

Sounds good. I like the Magnaflows on my '87 Mustang.

Carb is a 770 Holley Avenger 4150 tweaked by me.
Car has 2.75 gears and probably runs 130 MPH.

> Suspension was rebuilt to stock specs with the exception of
> HD KYB gas shocks, poly busings, and a bit larger sway bar.

We've got KYB's on already and I was planning a larger front
bar with the wheel/tire upgrade.

> Ride is smooth and soft, but without any wallowing or plowing.
> Handling is exceptional for this size and weight car.

> Everyone that I have taken for a ride in this thing swears
> that we put a 429/460 in it.

That seals it. I was considering a stroker kit and better
heads but didn't think the stock rebuild AOD would be up
to it. A decent 351C will be more than enough for dad.

> The reinforcement plate you mentioned must be unique to the conv.

It is unique to the convertible.

> On the suspension side, I used 620 springs, 1" sway bar in
> the front, 5 leaf standard eye, no sway bar in the rear

Sounds a lot like my '66. Dad liked the way the GW negative
roll kit worked but wants a softer ride so we were going to
keep the stock spring rate and rubber bushings in most locations.

with Edelbrock shocks all around. I have also installed subframe
connectors as well. I have Total Control upper and lower control
arms and strut rods, but have yet to put them on.

> Also, the 620 springs along with the Hedmans remove any ground
> clearance there was. I have to avoid speedbumps.

Have the same problem on the '66 but hopefully dad's will have
more clearance without the lowering springs.

Thanks for the input guys,
Dan Jones

Moneymaker
Administrator

Posts: 29200
From: Lyons, IL, USA
Registered: May 99

posted 11-30-2005 04:54 PM     Click Here to See the Profile for Moneymaker        Reply w/Quote
Ground clearance is not an issue at all as long as you have a good exhaust man. (muffler shop)

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28

The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 11-30-2005 06:16 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
quote:
Originally posted by Moneymaker:
Sound is fabulous and performance still amazes even me.

That's why we love those Clevelands.

Imagine that combo in an '86 F-150 with poverty caps and snow tires and you can imagine the looks I used to get on the highway when I'd beat Corvettes and IROCs trying to pass me.

------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'05 Mercury Sable LS 3.0L DOHC 24V Duratech V6

Mach won
Gearhead

Posts: 265
From: Walnut Grove, Ca. USA
Registered: Nov 2004

posted 11-30-2005 09:08 PM     Click Here to See the Profile for Mach won        Reply w/Quote
quote:
Originally posted by Moneymaker:
Ground clearance is not an issue at all as long as you have a good exhaust man. (muffler shop)



Alex, the problem I have is the header tubes themselves will rub on speed bumps. None of the work that my muffler shop did, have any problems. Right after the header flange he tucked the pipes up out of sight.

I guess it's possible to have a good shop remake the headers, but I'm lucky enough that the amount of speedbumps I come across, I can avoid them no problem. Besides, I think it looks kinda cool with the headers partially visable.

But then again, I just may be lucky period... I've never had to shovel snow.

Moneymaker
Administrator

Posts: 29200
From: Lyons, IL, USA
Registered: May 99

posted 11-30-2005 11:19 PM     Click Here to See the Profile for Moneymaker        Reply w/Quote
Yes, I understand. The "econo" headers you have are made generic. They are designed to fit a multitude of Mustang bodies with a 351C engine.
The Hooker SC I used is a dedicated 71-73 header and tucks the tubes up far better than the Hedman. Beleive me, for the price difference I would have prefered the Hedman on this project, but I just couldn't bare to have that cheesy look and chance any ground clearance issues.
The entire format of this project was to be stealth.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28

The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

Mach won
Gearhead

Posts: 265
From: Walnut Grove, Ca. USA
Registered: Nov 2004

posted 12-01-2005 12:05 AM     Click Here to See the Profile for Mach won        Reply w/Quote
quote:
Originally posted by Moneymaker:
Yes, I understand. The "econo" headers you have are made generic. but I just couldn't bare to have that cheesy look

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