Damaged crank flange

pishta said
No idea, id have to weigh the pistons to the rods and then figure what a 360 bobweight is. If its a 360 crank , itll take a 360 bobweight. You think it would be as easy as weight matching the 318 truck pistons to some stocker 360 dish pistons? I got the bigger rods already and a set of heavy 273-2 pins. If my 273 was still apart, Id chuck it in there with 273-2's and see where the pistons end up at above the deck. Well see how the crank comes out tomorrow.

Well, if you are using the heavy rods like were used in all the 360 LA's, then weight matching the 318 and 360 rings, pins, and pistons will get you as close as a factory balance. My data shows the 318 pistons+pin+rings being about 16 grams more than the shorter 360 pistons (798 grams total vs 782 grams total), so it ought to work fine just taking some weight off.

15 grams off a piston can be some work unless you mill the dome, in which case it comes off fast, so some might have to come from the pins, or you can take it off the small ends of the rods too (though that would change the rods forever). If you shorten the pins, then I'd make sure that you still have at least .6" of weight bearing length in each pin boss.