Did you ask the guy at the Truck Shop how much his conversion was? No free lunch when it comes to this stuff. Do some research and add it up: 700R4 transmission with a torque converter, flex plate, TVS cable, trans cooler & lines, rear cross member & mount, modified drive shaft with new slip yoke. Also shifter assembly. Labor to remove existing components & rear cross member, install new components & fluid.
It could very well cost over $3500.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine