You can do that in the truck, easier if the motor is already out, but it can be done.
My dad owned a machine shop when I was a kid. I rebuilt my first 350 at 12 years old. It is not hard, but the machinery and tooling is big, and expensive. You can tear it all apart your self, farm it out for the steam clean and machine work and assemble yourself.
Machine work is as follows:
grind cam and crank if needed,
align bore crank and cam journals if needed.
surface heads and block if needed
bore cylinders if needed
hone big and small ends of rods
3 angle valve job
Order a rebuild kit, ensure it has all gaskets, rings, new pistons, rod, cam, and main bearings, wrist pins, lifters, push rods, freeze plugs, oil pump, and water water pump. Reassemble following the order and torques in the Chiltons manual. Only special tools you should need are a torque wrench, and a ring compressor to install the pistons.
You will need the final dimensions after machine work to get the right pistons, rings, and bearings as machine work will change the dimensions. Assemble using non detergent 30W oil, make sure you pre fill the hydraulic lifters...
It isn't cheap, the machine work is time consuming, the equipment is huge so the shop pays for a lot of floor space, expensive so there is big bills, and journeyman machinists make much more than auto shop mechanics hourly wage. The machine bill will be your biggest expense. I would say 15-20 hours in total, it has been 30 years but even back then dad got about 80-90 an hour.
This is not a step by step how to, so if I missed something don't get to mad at me.
