so dont just replace the valve?

 

will these fit D2TEAA there for a ford 390 but there brand new and have everything with them for 30$

 

Not true[&:]...the 351 uses 1/2 head bolts and to interchange 302 heads to a 351 the smaller diameter holes on 302 heads 7/16 to be exact need to be drilled out th 1/2 inch to due such a swap...that's to say the block is a 351

 

no not in the least!!! they are for a FE block not a windsor based block ...completely different style you need 302 headsor 351 heads depending on what your block is

 

come to think of it, if you heads actually say 351 on them i would tend to think they are early heads (69-74) because after that the castings were the same.

once you have the head off, look under the intake runner and find the casting number, if its a C9 or a D0 you want to get those heads fixed. you'll also want to get hardened exhaust seats installed in both heads (hell this could be your problem with bad compression if it pounded the crap outta a unhardened cast iron seat in the head)

 

so why just one cylinder? im going to get them professionally rebuilt but how much are seats?

 

Seats are inexpensive, I've hear that the viton umbrella type are the best. If you dont' already have this type on there some machining is required, but you are getting them worked on anyways.

 

^ bad post, bad.

SEATS are hardened steel and are about 10-15 bucks each to install - you need 8, the intakes do not need to be replaced.

SEALS are what mattkoly is referring to, and umbrella's are the WORST seals you can get. make sure the shop that does the work installs a positive style valve seal, the exhaust seals should be poly-acyrlic or viton - nitrile will get hard very quickly and not seal properly.

of course, we're basing the seat machining off the fact that these are "early" 351w heads. WHAT ARE THE CASTING NUMBERS?

 

i dont remember its like -102032939483 degress outside. it started with 3g maybe 3g96?

 

i found a pair of heads. the casting numbers are E7TE PA T8 and E7TE PAT52 does that mean its 2 different heads? i havent seen them yet thats just what he told me they were. will they work?