340 Rods, speed pro L2316F “stock” weight is more than stock piston

Rebuilding a 340, getting close to assembly and have a few question on rod/piston/balance weight. The rods are stock rods, have been reworked, new bolts etc.. I have the speed pro 10-1 compression pistons that are supposed to be a close stock replacement weight. Have heard and looked up that stock 340 pistons weigh 719/720 grams, the speed pros weigh 745 = 25 grams over stock. The rods mostly vary from 759 to 767 grams (averaging 763 grams) and one of the rods is almost like a copper plated “have heard domestic auto companies did this to fix flaws to still use a rod” but that one weighs 774 grams. I am not trying to get them spot on back to stock weight just close to avoid vibration. If they were a few grams off I would not be worried about it, even just to get the rods to match would mean cutting 14ish grams off of the copper rod, even more to make up for the 25gram over stock piston. I did some grinding on the copper rod just to see what it would take to just get it even with the lightest stock rod, it is taking grinding/rounding off the tip bulg on the small end of the rod and a little off of the big end. Will this make the small end weak? Is grinding the rods to match the way to go? Have looked at scat and other 340 rods that have the small end rounded off but know that’s how they were designed, have over thought this to death. Any and all advice is greatly appreciated