8 1/4 vs. 8 3/4

How many Cubic inches and compression
That 4 speed is still gonna beat the rear end up.

I would be watching for a Dana to build

The tubes are .500" thick

http://s1113.photobucket.com/user/Skippy501/media/green dart/005_zps675ff587.jpg.html

410 about 11:1