[jocko]

if the wilwood mc and prop only have 3/16 line capability, then it is likely designed as a disk/disk mc and prop valve. Can you use it? Sure, but why spend that amount of $ on something designed for a 4 wheel disk high end camaro restomod? My thought/recommendation - Wilwood is overkill for your truck (please don't take that the wrong way) - I'd spend the $ on one of member PICKMUP's beautiful stock mc/distrib block/booster setups specific to your application. I have one waiting for my K20's rebuild. However, I did completely redo my 71 C20's brakes - disks, calipers, drums, pads, shoes, all lines, booster, mc, and distrib block - and it stopped on a dime. It was quite the transformation - and I got all the parts at Autozone and they weren't expensive as I turned in the cores there also. You can't go wrong with stock, when new and tuned, it's about as good as you'll ever need. Unless, of course, you're taking your C20 slalom racing.

EDIT: one more note - make sure you are buying C20 (not C10) hydraulic parts (MC, distrib block, etc) - they are different from C10, and plumbed differently from the MC to the block. For example - the front reservoir on a stock C20 MC is for the rear 1/4" line brakes - the opposite of a C10. Make sure to ref the shop manual. If you go full custom with a Wilwood setup, all bets are off, you can build however you like at that point. Just mentioning in case you go with the stock approach.