if you go hydroboost a cost effective way of doing it is finding a diesel chebby/fard as most of them use hydroboost, thats what I did. I used a 1994 3/4 ton chev diesel hydroboost system ($25) and made my own lines ($20) and had a brake rod machined in order to use a dodge master cylinder ($20) way better brakes then manual or vacuum boost; before this I was condsidering a disc swap but I don't think I will now