Join Date: Jul 2008
Location: southwest lower Michigan
Re: Preparing for 11 seconds
c-clip eliminators convert the c-clip axle to a press-on bearing and retainer block so that is its much like a 9" Ford style.....so it the axle breaks anywhere along it's length or the c-clip button breaks off or the axle twists off at the spline the wheel and axle don't exit the car causing considerable damage to the car, anything the car might hit out of control, or you.
Looking at the newest rules, they aren't a requirement until you go 10.99 or quicker, or if you have a spool, mini-spools included.
Old spec used to be 11.99 or 11.49, I don't remember which....so you should be good there, but it is still a safety issue IMO if you have stock GM axles are are trying to hook and launch a 11 second car.
I doubt you'll find a driveshaft loop kit that will just bolt to the trans crossmember, you'll probably have to make that adaption of a commonly available loop yourself....but I'm not totally up on what new stuff might be out there for the A-body, somebody could be doing one now.
I did one years ago for a friend where we just built what looked like a second trans crossmember but with a loop in the center instead of a trans mount. He didn't want anything permanent on the car.
I left out the obvious stuff for general track tech....all lug studs present, studs visible if using aftermarket wheels(open end lug nuts and stud protruding though them), dual carb return springs, 1qt minimum radiator overflow, locking trans dipstick, metal valvestems, no snap-on wheel centercaps or hubcaps, factory seat belt, helmet still in cert spec, rear main electrical shut-off if battery in the trunk, neutral safety switch and there might be something I missed.