I had the 750HP which is a DP without a choke, on my 438 stroker, 5-spd manual truck.

I had some issues with having to feather/pump the gas to get the motor off idle without stalling, but once the RPM was up, and the clutch pedal was out, I could stab it WOT and it would go. no bogs, no hesitations, no transitions etc.

I played with the pump cam on the primaries, and was able to get the "just off idle" hesitation out of it, so that from a dead stop, I could simply give it a little gas, let the clutch out, then stomp it WOT.

with that 750HP, my 4200 lb truck, 438 cu inches, 4.56 gears...I was able to get about 12 MPG on the highway, and around 9MPG in town.