Very common practice since that basic transmission was used in several configurations
up until 67 in both cars and trucks. The long rear housing was used in trucks through
63 and cars through 57. The short rear housing was found in cars from 58 up and trucks
from 64 up.
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