Master cylinder and booster upgrade

[72LSLB]

I'm replacing all the brake lines on my 72 C10 LB. It has front discs and rear drums. I may upgrade the front calipers and rotors. I currently have McGaughty 2.5 drop spindles and could get their 13" front disc kit but they don't sell the kit without the spindles because they are machined to allow the caliper brackets to fit. So I may just leave the stock front discs.
I was thinking since I'm replacing all the brake lines that this would be a good time to upgrade the MC and booster. What have you guys installed that is plug and play; no linkage change? Just bolt on and go...

Thanks