Thanks Jr:shakehands:
I didn't pioneer this adaptation... it was actually done more than 4 decades ago !
Unfortunately, it became lost in the "12 bolt / 9 inch shuffle"
I see these cars ( 5,6,7's ) as pieces of history, and I tend to treat them with respect. To me, unless you're hitting it with excess of 600 horsepower, it quite simply is not necesary to "dis-respect" the rear end !
I manufacture formed steel bearing cap girdles, which ELIMINATE cap breakage. The next step, is the 30 spline axles. There is now available, a reproduction of the PROPER Dana 44 Power-Lok differential unit... which is hand over fist superior to the single-shaft Eaton unit ( there's another as well:confused0006: ).
Simply aquire one of those, or a factory 61-64 unit, and install the 30 spline Dana 44 side gear kit, with corresponding clutch pack.
Moser has made dozens of these axles for me.
put it together, and beat on it !
BTW... yes, I run a 5.13 gear in the 1962 Chevrolet rear-end in my 3650 pound 409 Stocker. To date, the car has had a 1.59 60 ft, and goes through the traps at nearly 123 MPH.
The 5,6,7's, with a good 300+ pounds less weight, are certainly worthy of "respecting" that original rear-end:happy0011: