You will need the complete engine/trans assembly, as nothing 235-related will bolt up to the 292. It has the same bellhousing bolt pattern as a 55-up V8, not a 6 cylinder.
A 55-62 V8 standard shift truck bellhousing with the angled mounts will bolt up to the 54 crossmember if you choose to run a standard transmission, but you'll be on your own for front motor mounts. For an automatic, you'll need to add a rear transmission crossmember and modify the one under the bellhousing for extra clearance. A new driveshaft willalso need to be fabricated.
Jerry