360 heads on a LA 318 vs Magnum heads on a LA 318

360 heads on a stock 318 equals really low compression probably in the 7:2:1 range, pretty much loss of low end but you gain high end.

but keep in mind the roller La 318 had taller pistons and actually were 0.040 in the hole. In the ones i took a part, those 360 heads are like 72CC mill them down .040 probably get you in the 68cc area Advance that camshaft 4 degrees or more to build up some pressure run a thin *** head gasket you might be alright, then again depends on your camshaft and rear gears also.