GM B-Body Forum
- Posts : 747
Join date : 2013-01-14
Age : 27
Location : Flint/Detroit, MI - Charlotte, NC
I didnt get a chance to check them two side by side, but the only thing i can think of is that the piston size must be different, other than that i have no idea what the difference between the standard and "heavy duty" they have listed, one thing might be the rear discs, being the standard versions all had drums, idk if the fluid capicity inside the heavy duty version is different , even though GM used the same proportioning valve, idk for sure, one thing i do know is your car ahould have the heavy duty version, im thinking the 9C1s and the impala ss got them.
1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
1984 Caprice Sedan, 305 motor, 700r4
1978 Caprice Sedan, 305 motor, th350
1993 L99 Caprice, 4.3 v8, 4l60 trans
1972 Ford F-100, 302 windsor, c4 trans
2001 BMW E46 330i, 3.0L