Okay, first Question:
I am trying to find out data for the 1969 v2 351w heads intake/exh valve size and chamber measurements in cc and max lift that can be used. At this time I cant afford to get GT40 heads so I'm trying to make the best of what I have on hand and maximise their potential. Does anyone know where I can find the specs?

Second Question: I noticed that on alot of 289 and 302 configurations that there are valve guides installed. Is this something I should consider puting on a 351w? I dont think they came with them nor have I have ever seen any with them. But then again, I have not worked on alot of these either.

Third question: According to the basic specs,I know the compresion ratios are diffrent on the v2 at about 9.5 and as for the v4 at about 10.7? So whats makes the diffrence between them?

Last question: I have herd many people are looking spacifically for the 69 heads. I am curious as to why others prefer the 69 over others. Does anyone know if there are diffrences in the 351w stock heads for a 69 and a 70s and above? I did find some data covering the 70s head and was curious if it was good enough to use in my calculations.

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JOHN
--69 coupe restoration on the way.--

So out of this so far I have basic information so far for my 351W
Bore at 4.030
Stroke of 3.5
head chamber at 58.9cc
head gasket thickness of .039
I guess after the boring it makes it a 357W or 5.85 liter.

All I need now is the cc specs for the pistons. I have no idea what kind they are but they are (.030) to match the bore. Looks to have a slight cup. Is there anyway I can find out the cc for these? They could be a standard stock style but not for sure. If I go with flat top pistons I figure my compresion will be around 11.9:1. Anyone know where I can find basic specs for stock style pistons that are .030 over so that I can compair the diffrence?

my plan is to use the stock heads (ported of course) and a cam thats Adv. Duration: 284?/284? @.050: 218?/218?
Gross Lift @ valve: .488''/.488'' @ lobe: .305''/.305''
Lope Sep Int C/L 110? Sep 106? Int C/L and matched Hydrolic lifters
I was told that the stock heads will not work well with anything over a .500 lift.

Anyway, At first I was going to go with a 600 Holley but through calculations a 700 would do better on a 351(ops i mean a 357) with a litle to spare. Also a weiand stelth intake (plan to port match with the heads and carb), Sealed Power RP3225R hardened pushrods a Dynagear dbl roler timing chain, Melling high vol oil pump with hardened drive rod. Clevite77 rod and main bearings and Molley rings. I havnt decided on the distributer as of yet but for starters I may stick to a stock setup with a pertronix II and 8mm super stock custom wires and splitfire plugs.
Dyngear dbl roler timing chain set with options of 2? retard, 0, and 2? advanced. And last but not least a good set of headers, dual 2 1/4 exhaust and flowmasters. with the timing chain having 3 settings, how should it be set with this setup? Anyway, I am open for ideas and comments. Am I on the right track and a good parts match? And of course, the most famous of all questions "what kind of performance do you think I will have out of all this"? I dont think anyone has posted a calculater to estimate the HP based on specs, if so I havnt found it yet. Guess I will have to just take her to the 1/4 strip to find out once shes all together.

My main goal is to have a weekend cuiser, occational carshow appearances and an occational run down the strip for thrills every once in a while.

quote:

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Originally posted by luvn69:
Okay I found out the 69 stock head information. looks to have a 58.9cc chamber...If I go with flat top pistons I figure my compresion will be around 11.9:1.

I was told that the stock heads will not work well with anything over a .500 lift.

a good set of headers, dual 2 1/4 exhaust..

Anyway, I am open for ideas and comments.

OHH! before I forget....put a metal screen...in between the intake and the carb

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John,
If I recall correctly, I have read that there MAY be a difference in 2V and 4V for 351W '69/'70 heads, but other books claimed no differences in combustion chamber volume. You may want to confirm either by taking some actual measurements rather than depending on printed material.

I don't know what you expect regarding,
"..will not work well.." but I'm thinking if you do a little home-porting on whichever '69/'70 351W OEM heads you use & check your pushrod/rocker arm/valve tip geometry I wouldn't be afraid to use a cam with over 0.500" lift. However, I wouldn't put a bunch of $$$ in them, since you can buy newer technology and/or aluminum heads in the new aftermarket heads available out there.

I'd suggest you look hard at using ceramic-coated Hooker SuperComp long tube headers and bump up to a 2.5" or even 3" exhaust system. IMO, since you plan to run mufflers on it, 2.25" mufflers would choke it down way too much.

I recall back in the day, there was a company that advertised intake gaskets with fine screen in the port openings & claimed the same gains.... IMO, it was another hype gimmick & I wouldn't go there.......

You could use a bigger cam, but be careful you will need pistons with deeper valve reliefs cut in them to keep enough clearance.

Unless you are going with roller rockers the valve guides are not necessary.

The reason everyone wants the 69 heads is for chamber volume. After 70 the volume got larger and compression (performance) went down as well. I hope some of this helps, I too had budget constraints and went with a good port job on my 393W.

You need a little more info than just the piston cc. You also need to know how far the pistion is down in the bore. The 11.9 number you came up with is probably high since you say the piston seem to have a slight dish. When you figure in the piston being down in the bore, unless the block has been "zero" decked and the dish in your pistons you are probably down around 10 to 1. The only way to tell the cc of the piston is to check with the manufaturer or measure it yourself.

As far as the 69 2V and 4V heads being different I have never found any information that supports that. Both engine specs list the same combustion chamber and valve sizes.

Wanted to also mention that the cam is not real aggressive for a 351, the lift is not much more than stock, and that running a cam with over .500" lift is not a problem as long as you use the proper valve springs.
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Ronnie
69 mach1 351W-4V engineless at the time!
70 Torino GT 351C-4v with a "shaker"
Mustangs and More Member #23

If the pistons are dished, they're probably 18-20cc. If those heads have positive stop pedestal mount rockers, you'll want to look into screw-in rocker studs

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1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"