I run my '62 3sp+od off of a lighted switch on the dash and don't use any of the kick-down or carb. pariphernalia. The important thing to remember is not to start out in overdrive. I assume you've checked it out before installing. Mine is the non-synchro 1st gear model.

~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer