I remember driving a ford three on the tree with holes so big i had to stuff shop rags in them to get any heat.
No A/C in any service truck.
No radio or just a crappy AM radio, if you wanted a radio you popped some tin together and fabbed your own to screw to the roof above your head.
Speakers were whatever you found and could mount in your truck.
Buying a set of gages made me excited and my first fluke 87 cost 350 dollars and took months to pay off with a little bit at a time taken out of my check.
Building shelves out of unistrut and plywood