Hub drilling

I have the 8.25 rear so that should already be the 4.5” rear. It’s just the front that was drilled. Does anyone know off hand what the front suspension component differences between the six and V8 would be? If I already have 10” brakes is there anything else that was different between the /6 and V8? Just torsion bars? I was getting a quote from ESPO for a full rebuild kit and the asked if I had a 6 or V8….