Ahem, well there was a silly goof. Very silly one. Let's not get into that
My pressures are back where they are supposed to be:
P - 80 - 240
R - 125 - 290
N - 80 - 240
D - 80 - 240
3 - 80 - 240
2 - 230 - 240
1 - 230 - 240
The shifts are firmer with the new band and appropriate clearances. My guess now it the torque converter.
Back from a day at the track...
First of all, I note that I am shifting at 5500 RPM and my RPM drops to 4200 +/-100.
Towards the end of the track I am in third at 5500 rpm and still not have crossed the line at 103 MPH.
Sooo, if I punch in: 5500 RPM, 28 inch tires, 3.42 rear, gear ratio 1, and MPH 100... I get 34% slippage. That seems excessive.
TCI - TECHNICAL INFORMATION: Racing Calculators
Also - with my TH350 when I shifted at WOT I would get tire-shredding shifts. Here I can feel a fast shift but it is not hard like it should be. (I have a billet servo, wide band, PTS shift kit, etc.)
Currently I have a TCI 3000 Street fighter in there. When I had my 2200 HD Bowtieoverdrive unit in there it shifted a lot harder.
If I can find my old unit back I will put it in.
Furthermore, on the highway, when I engage the lock up, the rpm falls by 500.
The converter easily shudders when I give a bit of gas (could be another issue all together)
Soooo, this is what I think I am going to examine first.