The thicker bushing would add some grams to the small end but the .990 pin would more than make up for it.

The deal breaker might be how much will it cost to have bushings made and fitted vs new .990 rods.

I guess if your rods say Carillo or Oliver on them and your build is better served with a .990 pin, I'd bush them down. If they say Scat or Eagle on them, maybe not depending on machining cost.

Kevin