big block questions

I dont want to tear into it because its still so fresh. It still has crosshatching and bearings are like new. I think ill just have the heads shaved down something like .030-.050 im not sure yet. Also i need to find the formula for how much to cut the intake when milling the heads that far. Id like to see 400 hp at the crank but i dont think that will happen without a turbo lol just to save the time, labor and money i might run it as is with headstuds and a turbo. Any idea what the torque numbers would be for a 440 with 250 bhp? Id think somewhere near 300 atleast?