I'm faced with a choice bewteen Motive, Richmond, or GM Perf Parts gears. Which one do you all recommend?

 

being involvedin hard core offroading I can tell you that Motive is good my preference is Superior..hands down but not sure if they have em for your car.

 

I put Motive's in my 4000# 76 Skylark (10 bolt) with ~300HP... LOTS of abuse behind it and they ran quiet with no problems. The shop I took it to also said they don't use anything but Motive anymore due to the high quality.