I used an A & A 10 inch medium stall behind my 408 Dart motor. 517 tq at 4600 and it stalled 4,000. There are three stall versions, about 400 rpm apart. Mine was the middle one. It had decent lockup. 2600 rpm at 60mph with 27. Inch tires and 3.55 g e ars.
$700.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky