427 bbc hp guesstimate

[J_PEPIN87]

I'm currently putting together a 427 big block for my '74 and would like to know how much hp yall think it will make?the specs are these.
454 block bored 30 over with 427 internals.
Gm crank and rods(stock stroke)
trw dome top pistons part#l2239nf-30
comp cams magnum 292 cam
049 heads with 2.19/1.88 valves no port work
comp cams magnum roller rockers
holley dominator intake
i plan on using a 850 dp carb?
Comp ratio not sure but i think it should be @ 10.5 to 11.the heads were milled a little but not sure how much,the block was also decked but not sure either i know it wasn't zero decked though.i know its hard to guess with out comp ratio but i would just like opinions from yall and wat yall think about the combo thanks a lot.