i was wondering if u can put a cam from a 90s model 351w into one form the 80s and will gt40p heads work on a 351

 

as long as both are hydraulic but in mid 90's the 351w got roller cams.

 

You want to be careful mixing and matching. Not saying it can't be done, but the cam has to match the rest of the valvetrain in most cases. I've seen solid lifter cams used with hydraulic, and either of those used with roller lifters, but that was people with a heck of a lot more experience than me doing the build-up. The heads should fit - and if they are 'stock' equipped with roller lifters and the cam is a roller cam, it should be fairly straightforward.

 

GT40-P heads can cause some real issues with certain headers or manifolds. Might want to research that a bit. If you are talking about taking a used cam from a 90's block and putting it in an 80's: #1 if it's a flat tappet cam it needs to be low miles and you must use new lifters. #2 if it is a roller cam, the 80's block won't be machined for it. #3 just get a new cam that's fitted to your set-up.

 

yeah the exhaust is an issue but so are the head bolts, 302 are 7/16 and 351's are 1/2

 

Yes if you put a set of 302 heads on a 351 you will need to drill them out ..Lew

 

FWIW- NEVER use a hydraulic cam with solid lifters (or vice-versa)- the ramp acceleration rates are different and will munch a cam and usually everything else in the vicinity in a hurry. Same goes for hyd.flat and hyd. roller cams. The ramp speeds are very different. Use the appropriate cam and lifters to match.


Pete

PS- Nice avatar Matt...

 

now it is possible to run solids on a hydraulic cam but its not best for the average person to try it.

I like the avatar and i give credit where its due in my sig.

 

When interchanging the cam, make sure the firing orders are the same. I ran into this problem when I did an engine swap...