car is a completely stock 92 LX automatic and will only be driven weekly to the local drag strip and maybe a neighborhood cruise night once in awhile. for 2014 the motor will stay internally stock( that's the plan lol) with the exception of a tuner, cold air induction and long tube headers& exhaust. we are planning a 5 lug conversion and while replacing the axles should we step up the rear end gears or wait until the cam, heads, and intake get changed? looking at a 275/60 or 275/55 rear tire size.