Flaming River FR1506P Steering Coupler

I am using one of these with my manual box to clear 6.1 hemi TTi headers .
Polished Stainless Steel, 3/4" 36 spline to 3/4" Double D, $30.00 off EBay




For your Power box try searching EBay for 5/8 36 spline x 3/4 DD U-Joint
There are lots of them...

Happy hunting!