1967 440 Barracuda

Just acquired a 1967 Barracuda coupe. Solid California car with no drive train. I have a 440 and 727 in the corner of my garage. How feasible is such a project? What do I have to look out for? Have a lead on a 8-3/4 out of a B-Body. Will this fit without extensive modification?
Playing around with a few different ideas here including the RB, a small block (318, 340, 360) or a modern crate hemi. Seeking expert opinions and open minded.

Pics?
Not an expert opinion but the 440 will need exhaust manifolds (ebay) or headers (TTI or Schumacher), correct center dump pan with a dimple for the idler arm (440 source) , schumacher motor mounts, the 727 is no problem. Will have to cut a small square out of the LH motor perch to clear the oil pump.

8 3/4" Housing widths, flange to flange

A-BODY
B-BODY
8 3/4" Rear end widths, drum-to-drum:

A-BODY
B-BODY
Spring perch widths (center-to-center)

A-BODY
B-BODY
8 3/4" axle shaft lengths (measured from the tip of the splined end to the outside of the flange)

A-BODY
B-BODY