any 1 no where i can find a 351w

351mustang65 · Aug 10, 2007

any 1 know a company i can get a 1969 351w long block m code 4bbl heads cuz all the company's i see only have h code 2bbl or they have 4bbl only in 1975 to 1980

rbohm · Aug 10, 2007

there were no 351w 4bbl heads. only the 351c use 2 and 4bbl heads.

ratio411 · Aug 10, 2007

The 4v Windsor (69 only) had heads that were slightly different than the 69-75 2v heads, but it was very insignificant.

I think it was 4cc difference in comubustion chamber.
Correct me if I am wrong...
It was only the combustion chamber size though.
The valves, ports, etc... were all identical otherwise.
That is what makes 69-75 W heads such a good choice for a stock head.
Even the 2v versions had a relatively small chamber at 60cc.
IIRC, the 4v head spec'd out at 56cc...

96 DOHC Cobra · Aug 11, 2007

69 2V and 4V motors used the same heads. The difference in compression was built into the piston.

351mustang65 · Aug 11, 2007

so should i get a 69 h code and just put a 4bbl on it or should i get a 75 351 thats made to use a 4bbl?

ratio411 · Aug 11, 2007

351mustang65 said:
so should i get a 69 h code and just put a 4bbl on it or should i get a 75 351 thats made to use a 4bbl?

69 was the only year for 4v carbs on the 351w in cars.

ratio411 · Aug 11, 2007

96 DOHC Cobra said:
69 2V and 4V motors used the same heads. The difference in compression was built into the piston.

I need to read up on that...
Edit:
I read up...
C9 heads were 58 cc chambers.
D0 heads were 60 cc...
Everything else is identical.
In 69, the 4v used flat tops, 2v used regular dishes.
The same heads and dishes were used to 73.
The compression was lowered by using the taller deck block with almost .050" deck clearance.
After 73, the same heads were used, but with additional emissions plumbing.

rbohm · Aug 11, 2007

ratio411 said:
69 was the only year for 4v carbs on the 351w in cars.

in fact the 69 was the only year for a 4bbl carb on any 351w until the mid 80's when ford finally put the 4bbl carb on a 351w in trucks.

ratio411 · Aug 11, 2007

rbohm said:
in fact the 69 was the only year for a 4bbl carb on any 351w until the mid 80's when ford finally put the 4bbl carb on a 351w in trucks.

Yeah... I said "cars" specifically because 4v 351Ws were used in boats continually.
I think it confuses people when they find iron 4v intakes on eBay that are dated in the mid-70s. Many times the seller doesn't specify (or know) that it came off a marine engine.

351mustang65 · Aug 11, 2007

so should i just buy a 69 351 with 2bbl heads and put a 4bbl on it?

rbohm · Aug 11, 2007

351mustang65 said:
so should i just buy a 69 351 with 2bbl heads and put a 4bbl on it?

just buy any 351w and put a 4bbl carb on it. doesnt have to be a 69 specifically.

96 DOHC Cobra · Aug 11, 2007

rbohm said:
just buy any 351w and put a 4bbl carb on it. doesnt have to be a 69 specifically.

Unless you're trying to restore a 69 "M" code Mustang. What exactly are you doing?

rbohm · Aug 12, 2007

my guess would be that 351w is going in a 65 mustang, judging by his user name.

351mustang65 · Aug 12, 2007

yes i am getting a 351 for the 65 in my pics but my dad just got a 69 cougar xr7 convertible that came with a 351 im thanking of buying it and getting a new 351 for it instead

351mustang65 · Aug 13, 2007

anyone have a recommendation for a good company for long blocks

StangDreamin' · Aug 13, 2007

FRPP makes some nice ones; straight from the Blue Oval!

Never did ask, so I will now: How fast can you afFord to $pend?

351mustang65 · Aug 15, 2007

i just want a stock long block 351w but i dont want to buy 1 that was not done right

bnickel · Aug 21, 2007

there is a very slight difference between 69 2v and 4v heads but only in so much as the vlave springs were different. the 4v heads used a "dual" spring with an inner damper and the 2v's used only a single spring, the head castings are the same but the head "assembly" is different. can't remember for sure but it seems like the 4v also used a slightly different retainer and keepers. the 69 heads are also 60cc chambers just like the D0 and D1 heads. so other than the different valve train pieces and the flat top pistons of the 4v engine the 69 2v and 4v motors are identical, they both even used the same camshaft, which is kinda wierd given the different springs and ancillary parts on the 4v motor.

StangDreamin' · Aug 21, 2007

Maybe because somebody at Ford thought the 4V 351W driver's were gonna be cycling those valves/springs faster?

69 Rustang · Aug 23, 2007

bnickel said:
there is a very slight difference between 69 2v and 4v heads but only in so much as the vlave springs were different. the 4v heads used a "dual" spring with an inner damper and the 2v's used only a single spring.

I do know that my '69 H code came with dual springs.

any 1 no where i can find a 351w

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