351W heads
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Cargo Master
Joined: Mar 2003
Posts: 2,333
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351W heads
I'm asking this question because the casting # ID links in the sticky are dead.
Where are the head casting #'s located?
Are they typically visible while on the block? I can only see a 3 digit # under the #1 & #8 exhaust ports.
Do the air injected heads suffer from reduced flow?
Do the '69-76 use same heads for 2V and 4V?
I have a EB with a 75 Torino 351W (air injected heads) and access to 351W heads off of '69 351W 'stang.
I sold a bunch of 60's Pontiac stuff recently(many style of heads) and realized certain Pontiac heads are substantially more desirable. Is this the case with SBF heads?
Where are the head casting #'s located?
Are they typically visible while on the block? I can only see a 3 digit # under the #1 & #8 exhaust ports.
Do the air injected heads suffer from reduced flow?
Do the '69-76 use same heads for 2V and 4V?
I have a EB with a 75 Torino 351W (air injected heads) and access to 351W heads off of '69 351W 'stang.
I sold a bunch of 60's Pontiac stuff recently(many style of heads) and realized certain Pontiac heads are substantially more desirable. Is this the case with SBF heads?
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Cargo Master
Joined: Mar 2003
Posts: 2,333
Likes: 296
I'm guilty of what many others do. I should have searched forum before asking. Sorry.
I answered my own questions. This forum and the knowledge is awesome!
Looks like 69-70 heads are better other than aftermarket heads.
Good day!
Regards
Ken
I answered my own questions. This forum and the knowledge is awesome!
Looks like 69-70 heads are better other than aftermarket heads.
Good day!
Regards
Ken
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
I was just about to answer your questions for you...you took the fun out of it!
I'm planning to update the info in the the sticky, just haven't found the time yet. The head casting number link still works though.
I was told many years ago that the '69-'70 351W 4V heads were the best stock production heads (at that time). One of my books also says the '69 heads are better than the '70 heads. A friend who owns a machine shop and I spent some time looking closely at quite a few of these heads and could find no difference between '69 and '70 heads, and between 2V and 4V. They're not even marked 2V and 4V like some of the 289 heads, so the only way you know is if you know the car they came off of. I have a pair that came off a '69 351w Eliminator Cougar. No discernable difference between those and several other sets I have, and several sets he had. I believe he even cc'd chambers and ports.
I assume you meant "Better than other stock heads."! There's some good stuff out there in the aftermarket that blows away anything stock, both in cast iron and aluminum. But then you can get deep into your wallet in a hurry...
I'm planning to update the info in the the sticky, just haven't found the time yet. The head casting number link still works though.
I was told many years ago that the '69-'70 351W 4V heads were the best stock production heads (at that time). One of my books also says the '69 heads are better than the '70 heads. A friend who owns a machine shop and I spent some time looking closely at quite a few of these heads and could find no difference between '69 and '70 heads, and between 2V and 4V. They're not even marked 2V and 4V like some of the 289 heads, so the only way you know is if you know the car they came off of. I have a pair that came off a '69 351w Eliminator Cougar. No discernable difference between those and several other sets I have, and several sets he had. I believe he even cc'd chambers and ports.
Looks like 69-70 heads are better other than aftermarket heads.
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Cargo Master
Joined: Mar 2003
Posts: 2,333
Likes: 296
Thanks TigerDan.
Sorry for taking your fun away!
I did mean better than other stock heads.
I was thinking of scrapping the 69 heads but now I think I will hang on to them just incase I want some better performance.
On the air injected heads(1975 vintage), I simply plugged the hole at rear of heads with a hi temp sealant covered bolt. Will this method operate with satisfactory results or should I have done something different?
There is less than 1/2" between the firewall and the rear of heads, so any further monkeying around will be alot of work.
Sorry for taking your fun away!
I did mean better than other stock heads.
I was thinking of scrapping the 69 heads but now I think I will hang on to them just incase I want some better performance.
On the air injected heads(1975 vintage), I simply plugged the hole at rear of heads with a hi temp sealant covered bolt. Will this method operate with satisfactory results or should I have done something different?
There is less than 1/2" between the firewall and the rear of heads, so any further monkeying around will be alot of work.
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
That should work fine. Another method is to use a pipe plug, but it really doesn't matter as long as the hole is plugged.
Yeah, hang on to those '69 heads, they're still decent as far as stock heads go and can be ported quite nicely. I have two or three sets, one set has bronze guides, 1.94/1.60 valves, screw-in studs and major port work. Never been run since it was all done, maybe someday I'll flow test them.
Yeah, hang on to those '69 heads, they're still decent as far as stock heads go and can be ported quite nicely. I have two or three sets, one set has bronze guides, 1.94/1.60 valves, screw-in studs and major port work. Never been run since it was all done, maybe someday I'll flow test them.
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