That was the reason bolt on traction bars were invented, to eliminate wheel hop. Bolt on traction bars got a bad wrap because on some very high performance applications, with high traction, they could cause the rear axle housing to twist. If your making that kind of power and have that kind of traction, the 8.8 probably isn't going to cut it, nor will an 8 3/4 very long.
The original purpose of the pinion snubber was to limit the axle movement when the passenger and luggage load was at the maximum capacity, to protect the u joints from contact with the floor pan. The original design was not intended for high performance applications. If your slant 6 car or your 318 car have had the pinion snubber make enough contact with the floor pan to leave a mark, your rear springs have probably sagged, or have been loaded to the maximum load capacity too many times. You need to fix your weak spring problem. The same deal with the 51 Plymouth, originally the rear axle was several inches away from the floor pan. If you feel the need for a pinion snubber, readjust the ride height back to what it originally was, or add more clearance for the driveshaft and rear end, or correct your weak spring condition. The pinion snubber idea from a performance perspective was something Chrysler performance came up with after the street Hemi was introduced, and the adjustable pinion snubber was introduced for drag racing so you could adjust the rubber bushing against the floor pan.
If traction is the concern (or eliminate wheel hop), adding a clamp at each of the leaf spring ends on the front segment of the spring pack. That will solve the wheel hop, and most of the traction problems in a higher performance car. Its about the same concept as bolt on traction bars, but the clamps are cheap (you can use the worm gear hose clamps). Understand that if you are making high HP and have lots of traction, you could twist the axle housing. I can tell you without hesitation, I have put a lot of power down on the street with lowly bolt on traction bars (clamped spring ends and bolt on traction bars gave pretty good traction) for a lot of years and have never twisted an axle housing. I've broken a lot of rear ends (spider gears and ring & pinion gears), wore out a few sure grips, killed a bunch of U joints, motors, transmissions, and I have destroyed a lot of tires, but have never twisted an axle housing. Gene
