Built 340 stored 22 years suggestions

Has the engine ever been fired and the cam broken in?
If not, I would take the cam out, clean and slather on new cam break in compound. Then change the oil filter & add in fresh break in oil like Brad Penn.

Pop the distributor out and prime the oiling system.
Rotate the engine while the drill is turning the oil pump.
(Very important!)
Make sure the distributor is set to fire the engine off immediately.

Fill the carb with gasoline. Double check the carb for leaks & free movement. Then proceed to fire that baby up.

Power wise, to hard to call. Only because you didn’t state what heads are on top or if there ports are stock or ported. (Head flow numbers would be useful here if you had them.)

It it sure sounds like a barrel (or 4) of fun.
Keep us updated!
Pictures would be cool if you can.