Rico,
Welcome aboard! I'll be keeping an eye on this thread, as I have a '67 GMC pickup that was built with the 351 engine. It was sold to me with an HEI 350 and has just a heater, but I haven't seen any vacuum pieces. One of the levers was broken and I bought a complete new AC console from Classic when I was in CA last year.
I have yet to fit it and connect to the cables, but I'm sure the heater was working when I got it. I plan to fit AC when I have the time (Haha!), hence the AC console. Do I need any vacuum bits for the AC?
Regards from Down Under.
aussiejohn