Lock-Up wiring.....WITHOUT CONVERTER SHIFT VALVE in the Valve Body!!
The easiest solution is to stack Lock-up on top of the 3-4 Shift with the 4th gear pressure. You will need a N.O. (Normally open) pressure switch installed in the 4th gear oil port in the Valve Body, The Switch you see in the above pictures is where the Switch goes.
Bowler has a "Time Delay" TCC module that works very well in Swaps. A Vendor here is selling them at a good price
http://67-72chevytrucks.com/vboard/s...d.php?t=611898
Comes with a New harness, 4th gear switch & Dual Pole brake switch, Keep that in mind when you perceive the price to be high.