do waht you want, but i strongly recommend an upgrade on the brakes to new standards. it requires adding a tank, and check valve along with a push-pull control valve that's dash mounted. at least if you bust an air line the thing will stop, (quickly), and you will have a decent parking brake. the newer style brake chambers should fit the mount the same, you just have to run the air lines. (use plastic, dude. much cheaper, chemical resistant, clean up better, and last a long time). i know the hills arong pittsburg pretty well, and that old truck would make one hell of a battering ram if it ever gets away from you.
i'm pretty sure the tach is factory, and yep, there was a rev limiter (governor) standard. what carb you got?
as for the steering box, if you can, i suggest a rebuild unless you are real good at such things. usually seals can be ordered by number, and cross referenced to later model seals that will fit. check the wear area on the shafts where the seals are. lot's of times they are grooved. c-r (chicago rawhide) makes a stainless steel sleeve designed to restore the wear area to original specs. it's called a "speedy sleeve" and is available from seal suppliers. you might have to look outside of truck parst suppliers because parts guys these days need a damned computer to tell them how to think, and will fart and pop a breaker when you tell them the year of the truck.
around here, napa is pretty good, and they have enough old guys THAT CAN READ A BOOK.
good luck, remember to post your progress, stay awhile, post pictures, and remember we are all afflicted with the same sickness here.
addicted to old iron.
welcome
