Magnum shortblock capability.

Well, if you REALLY want to test it... throw in some ICON IC743 domed pistons. Very close to stock Magnum 5.9 piston weights..... per my numbers, just grind roughly 1 gram off the small end and 5-6 grams off the big end, and you're right around the stock 5.9 bobweight with the stock rods. No rebalance......but not sure how strong those rods are..... were they the ones that were pressed sintered iron?

With 70 cc heads, you're pushing 12:1 SCR with .039" head gaskets; you now GOTTA cam the crap out of it! But now you need the biiiig heads..... so maybe not really a basic cheapo build.

The only other light 360/5.9 pistons I've run across are Probe 12351's... but they are dishes and not much better CR than stock ones...low 9's SCR.