I've been running a TH400 behind a 305, RV cam, 600 Edlebrock, MSN ignition and a 9" Fjord rearend (3:35 gears) in my 51 Chev 1/2 ton.

This thing runs nice on the highway but is a hog off the line absolutely no chance ever of spinning the tires.

Is it possible that the torque converter from the 350 is wrong? Is there a different one I should use on the 305?

I would think that's it's unlikely that a 305 would be hooked to a TH400 in anything stock so that may the problem too ... maybe to much loss in the tranny for the 305?

Any thoughts or suggestions would be really appreciated.