I finally installed a playback tach to see what is happening going down the track with my 572 CID B1 original heads engine with 1.80 first gear PowerGlide trans.
Engine has B1 cast single carb intake and cam is 282/295 at 0.050"

Staging (footbrake) at 2,500 rpm, converter went to 5,400 rpm at launch.
Is this tight (low stall speed) for this application?