Lol
First, what year? On my 85 with hydraulic clutch, I cut the end off and tack welded a 3/8 female rod end. A 7/16, grade 8 bolt in the pedal replaced the worn "stub". No more slop or worn out plastic bushings. Will outlive the truck.
I know a bit about 4500's. My suggestion, based on experience, is just buy a rebuilt one with a warranty. Ain't cheap but worth the $$ to avoid the headache. Any used one will likely need rebuilt. They require a few special tools that are also hard to find and costly. 99% of them will have...
Dual exhaust is a waste of time and money if you don't have an engine that requires that much potential. Most people don't. A single 3 inch exhaust is more than enough for 99% of street driven vehicles. A single costs less, is easier to install and sounds just as good depending on muffler...
Partially correct. I converted my 85 from vacuum to hydro. Donor was a diesel so I swapped the whole system. The diameter of the piston may be different as well as the length of the pushrod between the hydro and the m/c. Piston diameter is related to the brake system option. Your K5 would have...