Main problem you are fighting is the closed chamber, back when they were factory installing this head cheap high octane gas was in every station you stopped at.
I would want to stay with the 291 head also for the power they can produce, you are just going to have to work it a little to get a pump gas compatable ratio. It is still too high with the correct 2349 piston even with the undecked block, but the fix is easy, just machine the dome down. 1/2 hour job, shop shouldn't charge more than $50 to do this - if you or a buddy doesn't have the ability or the equipment (lathe or mill). This would be the route I would take.
The closed chamber head will present the same problems with compression ratio on a 496, maybe more so as virtually all stroker combo's are configured for the much more common(and aftermarket standard) open chamber.
The 2349 piston fix is real simple, even a caveman could do it. An ambitious and motivated person could even do it with a flat file and a buttload of time if they are mildly skilled with hand tools, a pair of calipers and pay attention to what they are doing.