So what is that saying....."if it isn't broken,why fix it".... Thanks Dave for the info. This hot street car up the street has really opened my mind to the different type of diffs and made me question what I have and what advantage changing my diff centre would make. When I purchased the bucket it had 14" wheels with 60 sidewall tyres which when I purchased the Halibrands I went to 15" with a taller tyre which has given the car better cruz'n gears for the open road. As I said I would like to try my luck just for fun on the strip to see if I am any good but I have heard that dragracing is very very addictive. Maybe if I put the old wheels back on the back just for the strip that could improve the diff ratio for strip work,only for fun ofcourse.