Re: rear gear manufacturer success?
 

Ditto on the Jim Bailey process. Just got my new gears for my new car. Great. When I had my old car 69 440-6, I had Jim do a set of 4.56. We never before had a gear that kept turning when you turned it by hand. No noise, and we never broke it. 3750 lb car, 1.34 best 60 ft, go 1.38 anywhere. He cyro's them and then does a chemical process. Really nice stuff. Not expensive.

Re: rear gear manufacturer success?
 

Ace Pro gears. I break in by driving around for some 10-30 miles with header mufflers. I didn't see "anyone" who would question the mufflers or my choice of tires :)