One thing you failed to mention is what engine, transmission, rear axle, etc you plan to run with your "short bed". The stock gears for a 3600 are 4:57s, hardly a good choice for a daily driver. If it already has later model parts installed it may be more suitable for highway speeds.
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