I have a 97 scsb 5.7 and nv3500 transmission. I use the truck for day to day use and would like to start towing my race car. Would a 3.73 swap be of benefit to me? Would just get 10 bolt diff off junkyard truck to swap over. I think I would be towing approx 5,000 lbs. (nissan 350z and normal...