Photographs of an RB in a '64 Valiant?
Here is my friends 400/451 in my '65 Barracuda. Hi-po exhaust manifolds bolt right in and almost clear the stock steering column. I actually slotted my steering box holes and moved it over about 1/2 inch. It worked, but should have filled the slots back up once I got it mocked up for safety..Clearance on the pass side is about 1/4 inch but should be a little more as my K was spaced 3/4 inch to get firewall/trans hump clearance.