The 292 uses the sbc V8 bellhousing pattern, so the bellhousing will have to be changed also. I believe the input shaft on the SM420 is the same, but you'll want to check that. The biggest pain-in-the-neck with the 292 is that is uses staggered side mounts unique to that engine (the RH mount is placed forward of the LH one). A standard V8 mount won't work.
The 292 is a high-torque engine that is fun to drive... plus it has 7 main bearings, full pressure oiling, and HD truck exhaust valves.
