For some reason I was thinking they had a 25 spline axles.
I think you are right. The posi side gear was fine splined as I remember.For some reason I was thinking they had a 25 spline axles.
Rambling the man says,,,,,,its history to me.Tenxal above has a point.
My Z car has its original axles, both are the same as any other car I have.
I have heard for years about the possibility of different side gears and axles that were over the counter or shipped to guys like Bill Jenkins, etc. I never encountered them and I doubt they would have stood up.
In that day running either a 409 or Z-11 the Chevy rear end was ok when having to roll out and then stand on it with 7” slicks.
In all reality it was easier to just put a ‘57 Pontiac under it, I ran one with a 4:88.
Just a little cutting old brackets off and welding the new Chevy ones on.
If you didn’t change and you campaigned the typical Chevy rear end you had to have lots of spare parts. If and when you began to use wider tires the Chevy was sure to come apart.
I stuffed some 9.5” under my 61 Flattop. With a .060 over 409 and Frank Sanders’ Z top half I launched about 5-6 times. Finally I launched hard, hit 3rd gear and all hell broke loose.
The Chevy rear end exploded, sheared the side bearings off the posi case, cleaned the ring gear, twisted both axles, one completely in half, torqued the entire rear end tube from backing plate to backing plate, and driveshaft destroyed.
Fortunately a friend owned a wrecker
I’m sure changing side gears and Mopar axles made a difference. I remember you were legal if it was a GM product, but if you had the Mopar axle nut sticking out, nooo, you were in some modified class!
Lots of rambling, but that’s what I remember.