Large rear bolt pattern/hubs (Page 1/1) 1985 Fiero GT OCT 15, 09:10 AM So, I've read a lot about the s10 4wd hub upgrade to give a 5x4.75" bolt pattern and a stronger, longer lasting hub, but you have to change the outer CV to a 27 spline. I was looking at all the different hubs on Rock auto, and I see that the 2015 Corvette has a similar type of hub, and it is a 33 spline. Can anyone tell me if that can be made to fit in the fwd A-body heavy duty brakes (ex. Cutlass Ciera) knuckles, and if the 33 spline is the same 33 spline used on the Fiero, or if it is a larger diameter or the whole hub is to big to be made to fit. I've also vaguely read things about some minivan knuckles, is there an even larger hubbed version of the Fiero knuckle then the A-body HD brakes, that perhaps wouldn't require any modification to fit the s10, or Corvette hub if that's an option.