We are running the original stubs and rearend that came in my Z. It is a 1976 280Z we have had a 412 sbc with NOS, 355sbc with 671 blower on C16 racing gas , same motor and blower but with Alky and a Birdcather mech fuel injection, and now a 355sbc with twin 65mm turbos with E85 EFI. we went 9.21@153 on the stock haftshafts with the blower on racing gas, we then went to the 300ZXT CV axles, and the car went a 5.61@129mph and a 8.67@158mph in 2012 with the turbo setup. The car now runs 5.40@135, we have not run it in the quarter since 2012 but it should go a 8.40 @165+ in the quarter.The last time we dynoed the car it made 945hp at the rear tires.I hopes this sheds some light on your questions.We have been running this car for 12 years now. Jerry