Trendz,

I understand you would not put a race converter in this, but any converter that would not kill the engine in gear off boost is not going to stall anywhere near 2300 RPM behind the monster you built. I have a factory 440 converter (mopar designated it a 120K) and it instantly flashes to about 3300 RPM behind my NA 400/470 with 490 RWTQ. You may not notice this on a chassis dyno, but with the weight of the vehicle, particularly a old barge, it seems all that energy is just going to go into heat at the converter.

If you had a converter that would stall at 2300RPM with 900 ft/lbs, I don't see how the motor could run in gear off boost (guessing 20 ft/lbs).