Brake line size

[Bret B]

Looking for information on what size brake lines I need to run for a disc/disc set up. I've got the CPP front disc brake set-up in the front and Wilwood disc set-up in the rear. Years and years ago (like 1995) I bought a stainless set of lines for a disc/drum combination. Do not recall the manufacturer right now, and irregardless, the fit really isn't good. The tubes are different sizes 3/16 and 1/4 which I understand to be correct for disc/drum. I believe I can use pieces of the stainless kit but would need to make some other lines to make it work. So, what size should I be using for a disc/disc combination? Is there a reason the brake lines are routed down the passenger side to the rear and not the driver side (maybe because of the fuel line on the driver side?)? Stainless does now seem like way overkill considering with properly maintained brake system, new lines could last another 50+ years for mild steel or the copper/nickel (think that is what it is, could be wrong).

Also, any input on what manufacturer I should get the brake booster and master cylinder from?