I haven't had a chance to browse through the Santucci book for differences on the 292 and 250. Are there any other parts that do not swap over from the 250 onto a 292? Alternator and power steering should bolt on and maybe need a larger belt change. I don't know about the starter. Obviously the engine mount is different. But the HEI should swap no problem. I'm not sure of the difference in flywheel and clutch.

The difference in swapping a 292 in place of a 250 instead of a V8, is on the V8 everything needs to be changed out. The brackets, accessories, starter, flywheel, and even the alternator are different. A 292 is a significantly cheaper upgrade.