Welcome to the real world of aftermarket parts. There is no telling what you are going to get anymore regardless of who sells it. I'm finding that I have to modify many of the parts I get to make them fit. It's frustrating but it is a fact.
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