kb 399 piston weighs 552/132. Stock weight for a 318 piston was 591 grams. 360 was about 20 grams less. Pin was, I suppose, same as that listed above for the 360. Later 318s, I mean 1973 and up, used the 645 rod so the bobweight would be about 20 grams heavier than for the 360.
The early 318/273 rod was 726 grams, the 340/360 rod was 758.
The 645 rods weren't that much different than chevy 454 rods. This is my way of pointing out how heavy they were. It's easy to save 120 grams per rod by switching to aftermarket rods.
R.
Check out the KB/Silvolite website, they are clearancing some pistons.
Last edited by dogdays; 07/24/17 10:49 PM.