Depends on what year 292 you're getting. The crankshaft flanges on the 1963-66 292s used 7/16" flywheel bolts and a single dowel pin. If yours has this then either the 230 or 250 flywheel (maybe even the SBC) should work with no problems. The 292s from 1967 on used 1/2 inch flywheel bolts on the cranks and had 3 pressed in dowel pins. The 292 factory flywheel holes are cast accordingly. So if you use another 6 cylinder flywheel besides the 292 on the '67 & up 292, you'll lose 2 dowel pins - even if you drill the bolt holes out to 1/2 inch.
It's best to get the factory fitted flywheel. They appear on Ebay all the time. In fact,
here\'s one for a manual transmission
really cheap that's ready to bolt on (it's about $20 more than shops here charge just for resurfacing).
-ftyler