^On the contrary you seem extremely talented with what you’ve done to the truck so far. Don’t sell yourself short.
Even if you’ve had some help you know more than 99.9% of guys your age.
My point was, which I was not clear was don’t mess around with old leaky parts when new ones are cheap and easy to get. You’ve got a lot of time and $ into the truck, go get a new master cylinder and it will solve the problems. And be careful. You got a lot of new and shiny metal on that truck and brake fluid is worse than battery acid for ruining that.
Cheers