I went for 5 lug all the way around,on my 55.I am still running the stock rear.However I pulled the axles and had them redrilled for 5 lug wheels.The only reason is that I wanted the same bolt pattern on all four wheels.I took the axles and brake drums to Moser Engineering in Indiana to be plugged and re drilled.Another reason to go with the regular 5 bolt Chevy pattern is the availability of different aftermarket wheels. I am running chrome Corvette Ralleys on my truck.