Lee,
The whole premise of this aftermarket stuff is that it is supposed to be a bolt on otherwise we could go to Pick Your Part and get something and make it work. I don't have any problem making them squirm by stopping payment on the credit card. That usually gets their attention. I can't tell how many times I've taken something back to the Truck Shop that was in no way going to work and have them tell me that it's the first time they heard of the problem. Bull! Good luck with the conversion, I hope it works out.
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