I’ve got a 2000 LS1 with a spun bearing on number 3. Ordered a reman crank and I have a few extra LS1 rods at a friends house but I’m wanting to say they’re from a 98 and a 2002. Did GM use the same rods from 97-04 in the LS1. I’m wanting to say I noticed a difference in one of the motors I’ve torn down before but I can’t remember. The 2000 motor I have has 143 RM on the rods.

 

gen3 rods are more or less interchangable, if that's what you're asking.

 

I’m trying to avoid needing the engine balanced. I wanted to replace the two rods on the journal that the bearing turned on and roll with it. I just couldn’t remember if the rods were changed over the years (different weights).

 

97-98s were different rod bolts, but the rods themselves are all the same, +/- a gram or two