The easiest and cheapest way to make it a good driver is to put a 3 speed overdrive transmission in it. They were stock from the factory in that year so it would still be stock. Read up on them and locate the parts to make the switch. You won't be dissapointed.
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