Quote Originally Posted by Itoldyouso
Not a lot you have to do to a 455 to make it a good tow motor, but I would reconsider the "J" heads. These were the most restrictive, smog heads available from Olds from about '73 to '76, and have very small valve pockets.

Don
I've got a line on some "E" heads, not sure if they are the big valve version or not. Sounds like this may be a relatively low buck build, it helps that the cores are practically free

I'll keep an eye out for the industrial manifolds. With the C30 IFS on my F350, I havn't got a lot of room to work with as far as headers go.