Converter could be too tight, I don't really know how to figure that out given the info I have. He has the transbrake set at 5800 which seems like an okay number. Once I see the dyno sheets I'll have a better idea of where the torque curve is but 5800 seems like it should be in the fat part of the curve for a 540 engine. The car doesn't push thru the lights so the converter isn't super tight. I'm not sure where the stall speed is since the car doesn't have a driveshaft speed sensor. I think he shifts the car at 6600 rpm which seems a bit low for a 540 with good parts but once again, I haven't seen dyno sheets so I don't know where the power peak is. He did say the car went faster when he shifted at 6300 so maybe 6600 is a touch too high.