Kern Dog

Hello, I am pulling the 68 R/T off of the rotisseire and am strugling with the suspension. I am overloaded with opinions. Cass at Dr Diff said to start with the wheels. I want Magnum 500's in a 10" for the rear. 7" or 8" in the front. Question is 15" or 17". Nobody seems to sell 17 x 10's in the Magnum's. Do you have any input and photos of your ride?