magnum heads

hey, I jus noticed you are from south Jersey, I am originally from Vineland.
Any way, if you are going to try to get the comp ratio down, the magnums are a step in the wrong direction, I would just find some 360 heads and open up the chambers a bit and then use some thick head gaskets. I dont know of any good machine shops down that way anymore but a good machinist would have some ideas. You could also go with aluminum heads as they can take more compression on the pump gas. Another option would be to run a fairly big cam to bleed down the compression. Whatever option you choose you miht have a hard time getting the compression down to a point where it is tolerable on the street. The magnums have smaller chambers which would make more compression.