I am currently doing a 360 magnum block, with LA aluminum heads for a customer, so on your piston question, I used the h116cp pistons in a un-decked 360 magnum block, with the magnum crank and rods. The pistons sit in the hole a average of .006 we are using a .045 head gasket, 63.5 cc heads, and the pistons of 5cc of valve relief. It works out to about 10.3 to 1 static, perfect for the aluminum heads and hyd roller setup. The crankshaft DID require rebalance, it was out about 40 some grams if I remember correctly.
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