Running direct drive is not really for your application. A direct slips the band till it gets going. A band is not going to last long doing this on pavement, on dirt they spin the tires like dumping the clutch so it is not as hard on the band. My Dad tells me they use to push start rear pump automatics but said " you have get to haulin ass to make it work" based on that, I would assume a stall converter would make it worse.