With that low miles you should be very close to having a safe and reliable truck as is.
Go through all the brakes, replace all the seals and cups in the wheel cylinders, and be sure the shoes are thick and dry.
A complete service, grease and oil for everything that uses it.
One upgrade I would consider first is a modern brake booster with most importantly a dual circuit master cylinder, sized properly for your large brake system. The dual circuit MC is very much worth the extra factor of safety.
I drove my mostly stock 52 1 ton every day for a few years, never left me stranded, unless I ran out of gas... Later I added disc brakes and PS, but still a 1955 235 and 4 speed, it took me and a friend 8,000 miles in a month, from coast to coast. These trucks can be fun and reliable daily drivers, a number of other Stovebolters here have similar stories to tell. After all, these trucks were new once.
Be sure to get an original/reprint service manual if you don't have one already, and read it from cover to cover, or at least look at the pictures and read a few lines here and there, then when you need to know something you'll have an idea where to look.
With a low mile original truck, best to keep it original, but if you find you need a new or different engine then a 261 would be somewhat close to original in appearance, and a little more reliable and or less maintenance than the old style 235 or 216 you likely have. Most folks consider this an acceptable upgrade even for a mostly original truck. Nothing about the swap can't be undone later, it doesn't have to be permanent.
Grigg
