I am in the process of installing a cast iron Powerglide from a 53 Chevrolet car in a 51 1/2 ton. It will require making a new rear engine cross member to drop down low enough to accommodate the Powerglide. I used 1/8" thick by 2" wide strap to create an I-beam style cross member. The vertical piece is 3/16 plate stock.

The Powerglide mounting flange has 2 bolt holes on each side that are the right size and spacing to bolt the 3 speed motor mounts to.

This cross member is very rigid.

See my photos below.

http://woodlandsoftwaresolutions.com/images/crossmember-1.jpg
http://woodlandsoftwaresolutions.com/images/crossmember-2.jpg
http://woodlandsoftwaresolutions.com/images/crossmember-3.jpg

Hope this helps.

Last edited by 54Belair; 04/26/2017 9:08 PM.