Rear End
Upgraded to a 1968 Olds W30 heavy duty (HD) 3.90 posi rear end
1968 was a special year for Olds rear ends, created this unit specifically for drag racing with stronger internalsÂ
31-spline axles (original rear ends came with 28-spline axles), plus larger bearings, etc...
Originally came with an Olds 3.08 ratio rear without posi, so really happy with this upgrade
Bullet Proof!