Torque Converter Advise Please

Purchased a rolling chassis race car:
1968 Dart - All fiberglass & lexan 12 point cage
Ladder Bars / coil overs with 4:30 gears
11.5 x 31.0 Slicks
Supposed weight is 2450lbs with big block

Putting together a stock stroke 440 for this season
Should be your basic 500hp version, 10to1, with some ported 346's.
Max camshaft would be the .557 solid if I have room

Plans for next year include transbrake.

What converter size & stall should I shoot for? Also recommended companies please.

Thanks,
Jason