Depends on how well he likes rowing gears. I had a '65 Impala with a muncie M21 and racing clutch. It was fun sometimes, but when just cruising it was a PITA. I also had a '76 Stingray with a fairly stout SBC and racing auto trans, which was also a PITA to drive slow cuz it banged the gears so hard and so fast. If it was mine I'd go with the 5 speed...