To go 9.20’s at 3000lbs will require a little over 700hp, uncorrected, as it sits on the starting line.
So, you’d be shooting for 770-800 STP hp on the dyno.

Probably not the best plan for a stock block.

Making the power isn’t that hard.
Getting the stock block to live at that power level is the challenge.

I wonder how many have built stock 440 block combos that make 750+ hp(especially long stroke combos)........ and race them regularly(as in..... a typical weekly bracket program).