360 stroker how much HP is picked up if everything else stays the same?

pittsburghracer said
Ok we gained .40 going from a 4400 stall converter to a 5600 stall in my sons duster. You got a great cam so I would consider getting 8 (1.6) intake rockers to bump you up to .590 lift. Porting the heads and intake would surely grab you some ET. What size intake valve? What size carb?

2.02 valve , carb when racing was a BG 750 DP (that could be bigger). using a holley 880 cfm vacuum sec. on street. also just noticed the converter is a 4200.
might consider 1.6 rockers. T&D still good? or is there a better option?