89 C1500 6 lug swap

[olfaithfulgm]

I've got my 89 GMC c1500 torn down going to do a 6 lug swap on it, but I have run into a few problems. I am using rotors from a 89 chevy c2500 and axles and drums from a 90 chevy K1500. a few people have told me that they use the same bearings, and according to the parts house they use a National A5. but the inner diameter is to big for my spindle. my truck uses the National A6 bearing now, but the outside diameter is too small for the race in the rotor. so I am assuming that my truck has light duty c1500 spindles, rotors, and bearings, therefor i need 1500 heavy duty spindles so i can use the A5 bearing instead of the A6. Correct?

[Chris]

Go with spindles that match the rotors. So go with the light duty c2500 spindles