Nice looking truck.
I am 78 and have done amateur restorations on various levels since I got out of high school. Including a Model A, Model T 49 Mercury (2), 54 Corvette, 54 Buick,49 F-1, and a 1947 Gordon Smith Model A based air compressor (currently). I still own most of them, and all are running and driving regularly.
I am a student of automotive history, meaning that I appreciate what these vehicles represented when they were made. And yes, they do not go fast or stop fast. Model T barely stops at all. So you make allowances, choose routes, and plan accordingly, and do just fine. But I am driving and enjoying that particular chapter in automotive history, whether it be the 1923 T, the 49 Mercury (like the one I started with), the 49 F-1 (6) or the unrestored 74 Pinto. With exception of radial tires they are bone stock the way Henry made them.
From my perspective , get this truck running and learn about it. Experience what grandpa loved about it. After you know it well then decide what needs to be changed to suit your needs. Understand that a restoration is a huge commitment of time, money, space, patience and talent. Too many get taken apart and never finished because the hill got too steep to climb.
My 49 F-1 start and runs very well, stops adequately, is strong enough to pull trailers, and keeps up with traffic. It will not run all day on the interstate at 75, but 55 seems to work.
I'm glad you got the truck. Enjoy.