What stall for my 340 727????

Have a 10.5:1 340 w an XE282S cam (.520/.540 lift 282/290 duration). Was going to be going in a 4 gear so stall did not matter, but have now acquired an auto car to dump it in. Will be going in a dart w 727 and 3:91s. Was leaning towards a 3200. Im thinking a 2500-2800 will not be enough