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Author
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Topic: Shelby Drop Help!
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Fastback Nation
Gearhead Posts: 130
From: San Diego, CA USA
Registered: Aug 2004
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posted 07-01-2005 02:25 PM
   
I want to lower my upper A-arm on my 67 by 1" (shelby drop). Problem is, the template I found for it:
http://www.geocities.com/MotorCity/Downs/1966/granada.html
looks like it will move the A-arm forward as well as down. I know a 65-66 goes down 1" and over 1/8", but the problem I see is with the geometry shown on the 67/68 template is this:
The template I have keeps the center of the upper and lower holes at 90 degrees to each set's center line. But since the upper A-arm has a slight tilt already, the new holes will be moving the A-arm both down and foward by some amount. Is that right? I drew up a little sketch to make my poor verbage a little clearer, but how can I post it on this message board?
Thanks everyone!
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warhorse1
Gearhead Posts: 133
From: camino
Registered: Sep 2004
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posted 07-01-2005 06:53 PM
i cant believe there's not something in the archives weve done this so many times...i'll see if ive still got a metal template out in the shop....but it's one incg STRAIGHT down on 67 an up............Jay------------------
I know my limits....I just pass-out before I reach them
Run what ya brung and hope like hell ya brought enough.
Proudly annoying the neighbors for over 30 years
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68mustang351w
Gearhead Posts: 441
From: San Diego, Ca
Registered: Sep 2004
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posted 07-01-2005 10:50 PM
Yup, only 1 " straight down. Only ones that are drilled more forward (1/8" i think) are 65 & 66 ... David F.
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2bav8
Gearhead Posts: 226
From: Mesa, AZ
Registered: Jun 99
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posted 07-02-2005 01:59 AM
If you look closely at the template, you'll notice the top drawing is for a 65-66 Mustang, while the bottom one is for 67+Cheers 
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sigtauenus
Gearhead Posts: 3395
From: Va Beach
Registered: Jun 2000
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posted 07-02-2005 06:28 PM
I think the confusion is in what are we calling straight down?If you look at the drawing, the 1/8 movement off-center for 65-66 actually keeps the holes lined up vertically with no net movement fore and aft. The 67 + drawing stays on centerline which effectively moves the control arm a little bit forward.
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indyphil
Gearhead Posts: 2723
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 07-05-2005 07:45 AM
Im with Sig,
I did the same for my 68 (moved down on the centerlines) which actually moves it slightly forward. Worked fine. Main thing was to get the holes drilled where you intended them, I drilled some pilot holes.And get yourself an alignment when its all done. I detailed my new springs and shelpby drop a little in my website.
Phil
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Fastback Nation
Gearhead Posts: 130
From: San Diego, CA USA
Registered: Aug 2004
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posted 07-05-2005 12:48 PM
Sig and Indy, thanks!! You guys both got exactly what I was trying to say! The template will move the upper arm a bit foward because the new holes are drilled straight down (90 degrees) from the centerline of the old holes. You're both a lot more elequant in speach than I am.
OK Indy, now that I know you've done it and it works, I'll give it a shot. Thanks everyone!
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