Line pressure after shift kit

Reinstalling the stock converter fixed the problem. Factory drain plug allowed me to flush out the clutch deposits. The shifts don't seem that much firmer, but I was not able to really get on it as I was just cruising around on Memphis side streets. Don't really want to go wide open from a standstill either. I want the 7 1/4 to survive until the 8.8 is built. I would be interested in comparing the mods done on a Tf2 kit, but I haven't seen the instructions posted anywhere.