'68 318 to carbed Magnum 5.2: Check my checklist

Now. I'd think your compression w/stock heads should be around 8.2-8.4:1. I've heard of LA rollers having stock oil-thrus before. Magnum heads should bring it to right around 8.8:1.

While the Magnum pistons were different- I think they were functionally the same and without the heads would not improve the CR anyway like the old 318s where the CR bump happened not from same size closed chambers but from new pistons.

cudak888 said

Not that much of a problem. There's the Chinese Crosswisefartwind intake, of which a new one will cost no more than the Edelbrock Performer 318/360 that I have now. With a bit of fancy eBaying, I should be able to turn one into the other.

Are the head bolts on a Magnum head reusable like the LAs? If so, I might be able to dig up a Magnum 318 at the junkyard with good heads, bolts, pushrods, and the rest of the kaboodle.

-Kurt

Click to expand...

Most say they're TTY and not reusable so I can't suggest what I did.

We redrilled my heads for the LA pattern- course ended up going back to a Magnum intake in the end.