Can it hook?

My 62 Valiant slant six car is running orig 50 year old flat springs,I added a half leaf upside down from the axel forward,no clamps or snubber.Car is light and with a 90 shot my best is a 1.45 60 ft.10.57 @128mph,,,STOCK 50 year old springs.Friend thinks I should go Cal Tracs but I just dont see how they could really help my ets.I run 11.40s all motor,1.50s 60 fts and have about 275 rwhp.I think if I had higher hp and weighed more my set up wouldnt work like it does,,,then again???Guzzi Mark