If it was me I would get a tailshaft for an A-body. Send the tailshaft housing back to brewers on an exchange for an a-body housing. This is all you will need to convert the trans to an a-body. These are the only different parts. You can then weld your torsion bar cross member back in. And will then be able to use factory parts to assemble your car . I am sure someone near you must have an A-body trans for parts. I do but Shipping would be alot. The center of the cross will fit from any A-body The only difference in the crossmembers is from 70 back they are 1/2 inch bolts . 71 up are 3/8 . If yours is a 71 car make sure the cross member you have is the small holes. Also some of the later A-body 4spd's use a small slip yoke same. Make sure you get the matching tail housing for the tail shaft dia. B and E transmissions can easily be changed to A-body. Two parts.
