Well, I feel for Danny, this is a definite morale stomper.

Early in the thread my thought was the same as Pat's first comment. Now I'm wondering if at any of the times the engine and trans were bolted together with the TC in there were the bolts used to draw the trans up to the mounting flange rather than it seating fully "on it's own". If so, the pump would have been damaged probably due to improper seating of the TC.

The second thought is that something (improperly located check ball, incorrectly installed circuit plate, some debris, lots of choices) is blocking fluid flow in the valve body. If it were just the pump a chance that could be done in the car, but unfortunately you'll more likely have to pull it out.

Sorry guys.