what HP to expect? BB.

Ok guys, made a couple changes -

went with the 850 Demon carb, MT ET street drag radials, installed subframe connectors, and am just about ready to order a set of Caltracs. Low 12's looking possible if I can shift well? BTW the EDDy heads I bought are 75cc chambers, with corrected valve job and gasket matched. Zero Deck, 10.5:1 CR.