Hey Mike, Lets see if I can help. If you want to keep your orig. e-brake and clutch/brake pedels you will need to use a 41-46 bell housing. You can bolt that bell housing to a 216,235,or 261 with out any modifications, other than maybe drilling holes for the front motor mount.

As for the trans any orig 41-16 3spd or 4spd will bolt right up and you can bolt your e-brake to it. If you want to go to an open driveline you can jump to a T5 which will require an adaptor between the trans and bell housing, you also will need to fab a mount for the e-brake.

If you want to stick with a true bolt-up You will have to stick with a 41-46 bell housing and trans. The engine is up to you.

Good Luck
George