Power limits of the 7 1/4 suregrip?

The 7 1/4 rear is a lot stronger, then most people think, if it is in good condition. Just remember, by this time it probably has many-many miles on it, and is well worn. A 7 1/4 rear needs a sure grip to handle a performance engine. The early, clutch type SG rears, had 4 spider gears, while the open rears and the later "cone" SG's had 2 spiders. I would have no problem runing a 7 1/4 SG with a stock or "warm" 273 or 318, with a auto trans, it the rear was in good condition. I would not use it with a stick, it will not live with the shock loads of hammering gears. I ran a 3.91 SG 7 1/4 in my 66 Cuda for many years, before I found a "A" body 8 3/4, and swapped them out. My Cuda weighs 3250, has slicks, and turns low 13's at 97 mph in the quarter, with a 1.78 60 foot time. It is also a limited street driver.

PS" if you would want to sell the sure grip unit from the 7 1/4, please contact me. flturbo6@aol.com