There are so many parts that are the same it probably doesn't matter. However, I would procure the components for the vehicle the engine is going in to just in case there are some differences. I would also check the mounting locations on the engine you are going to install. 6 cyl car engines of that era had a side mount arrangement and truck engines had mounts located on each side on the front. I believe later engines had both.
Fred

Last edited by rfs56trk; 06/01/2016 5:08 PM.

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