The 292 is internally balanced. The 250 and smaller displacement flywheels are not a direct fit and require redrilling of the bolt holes and dowel pin holes. 292 flywheels are not hard to find and might be easier in the long run. Check to be sure the diameter is the same as the auto flex plate so you won't have to mess with swapping starters. The smaller sixes and the V8's used 2 different diameter wheels depending on the year and use of the engine.
At the least have it magna glowed and resurfaced and maybe have it and the pressure plate balanced. Be sure the machinist marks both the wheel and the pressure plate so it will be in balance when you install it. Any 1963 and up 6 or 8 cylinder bellhousing will the 292 and so will any of the older cast iron V8 Chevy bellhousings. You'll also need a pilot bushing in the back of the crank, avail from GM or almost any parts store.
