I personally think it's silly to wire it up for 'split shifting'. Wire it like a factory set-up and use it like it was meant to be used.

Also the SM319 is a Saginaw transmission with a Borg-Warner overdrive unit mated to it. You will need the side cover from your SM318 3 speed.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.