You could convert to a starter from a passenger car or a later (60-62) truck with a 235 engine. Some of the wiring would have to be changed to accommodate the change over. I personally prefer the foot starter on that era trucks.
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