Quote:
Originally Posted by singlesupra
couple more questions.
Front timing cover-is this the same reguardless of head chosen? if its diff how(besides making a custom cover or modifying a stock 5.4 cover?) to make it fit?
b heads- anyone ever ran a set of b heads on a 5.4? Any 5.4's ever came with b heads?
b heads- do the mk8's and cobras use the same cams stock?
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Front timing covers are "not" the same for DOHC & SOHC. You will need a DOHC cover for the DOHC heads.
No 5.4l ever came with "B" series heads. And I do beleive that someone on Modular Depo custom made a "B" series Cobra intake by cutting it down the middle(looking at it as if it were on the car) and adding material to make it wider. They did this to the upper cover and lower intake. Not sure if the intake was ever used though.
When I was pondering my build, going with 2V or 4V, I was scratching the surface of the "B" series heads. I actually CNC'd a set of adapters for the port mismatch for a Sullivan carb intake to be used. But I dumped the idea for funding reasons.
As for the heads on the MRK 8 and Lincoln's, they are the same even the cams.
The Cobra's are not. The castings I do believe are the same, but the cams, springs, and valve guides are not.
The springs were a better design for upper RPM's, the cams were a little more wild(I'm thinking just the exhaust was diffrent) and the valve guides are a bigger O.D. then Lincoln's.
I would think the "B" heads would be the ticket for a nasty N/A rev happy engine.