The time has come... 440 freshen for B-body

So I'm sitting here with the distributor out of the 440. I closed up the advance plate with JB-weld and filed it a bit but I'd like to know for sure what I'm aiming for. What should be a good advance curve for this engine? It'll be 8.5:1 at best with this cam:

721941-12 271 281 224 234 .518 .543 112 108
1800-5400 Fair idle, Hot Street & mild Bracket Racing. Strong mid range.

First is part number (Howards cam), then adv duration int & exhaust, .050" duration, lift int/exh, LSA, ICL

We will be running 3.55 gears with a 727 and stock 383 converter for a bit more stall (2200??), also the high altitude will require a few more degrees on top of that.

I'm thinking somewhere around 20 initial, 40 total all in at 2500 plus vacuum advance?