Polkat, from some old notes. I dont have exactly what you want. But it should help with some comparisons.

Stock, dirty 400 rod and piston. 1816 grams.

Stock, dirty 440 LY rod and piston. 2??? grams.

Lightend, 440 LY,s and KB 237/040 pistons. 1803 grams.


440 Source H rods and KB 237/040 pistons. 1748 grams.