You will need the shifter or a shifter that will pick up all the detents.
If you decide to go with a lock-up converter the easiest way to have it apply is using a vacuum switch and a normally "open" 4th gear pressure switch. Route the voltage thru the vacuum switch (hooked to ported vacuum), to the TCC lock-up solenoid, then to the 4th gear pressure switch.
This will ONLY allow LU once the transmission reaches 4th gear (overdrive) and it will only lock-up at light engine load. Anytime you coast or go to heavy throttle when in 4th gear the TCC will unlock just like it does in a factory set-up......
Using a vacuum switch also has it unlocking when you go to heavy/full throttle as vacuum falls off well below the set-point of the switch.....
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73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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