73 Duster build named Fred

my next question was about the converter, 8”? 9”? what’s it doing when you floor it? Not reacting hard enough, lazy, feel like not enough stall, etc?
8” 5800 PTC.

It flashes at 5750 but doesn’t hit hard like you would expect it to. Kinda feels like a slipping clutch off the line. Once it gets going, it pulls hard as you can see in the weak 60’ and decent mph