keep in mind that 60 years ago when these rods were made, the set you have may have been considered to be a matched set and close enough for GM at that time, since they didn't weigh things in grams back then, only pounds and ounces.
Grams versus ounces is certainly a factor here . . . but I have since read that GM typically would match rods/pins/pistons in pairs for balanced placement on sister journals (1-6, 2-5, 3-4) . . .
Guess I will have to work in pairs as well . . .
