I just did this, but I started with a piece of a K mamber and wound up using only the bottom to hold the rear Wishbone of the open drive '46 P/U rear. The bone is made from '36 rears, model A front yoke and ball, with a '46 rear made into a torque arm. You can use biscuit mounts and angle brackets to hold it up on the open drive ears. But if you are asking to use the big circle mount from a '32 style that's a whole different operation starting with the rear of the trans and mount/bearing retainer. If you want pictures of mine I can do that. It's not cleaned up and finished yet but it should give you a starting point to improve on. Tim