Mike,contact Livrat on this site.He may have what you need in a complete 68 set-up.
Also sent you some pictures by e-mail.
Maybe we can get all this straightened out by Christmas!
So far the set-up I put on my 65 Caprice is working well,except I blew the high-side hose on the p.s.
Now working on my 57's a/c install.Under-dash with A-6 pump.
I'll work on my 68 under the hood install this week-end.Just need to add the w.p. pulley and a/c brackets.
I'm not slow,I just don't have much time!
Mike.