340 Build.

Hey there everyone! So I'm going to try and make my duster do mid 12s hopefully with the 340 I bought. It's fairly stock from what I rememeber and it's a 71 block. I have a weiand action plus intake, Holley 750, and hooker comp headers. I'm also getting the heads cleaned and ported and get the valves seated. Any advice for a cam shaft? I was looking at a 3200 stall and I will be running with either 3.91 or 4.10 gears. Looking for a good solid roller. Any other advice for some extra power would be great!