So what is controlled by vacuum on the Valk......the petcock and the pair valves?
So if one has a manual petcock what would happen if one just capped off all the vacuum lines and just left the pair valves and crap where they are? Do the pair valves do anything without vacuum applied or just sit there taking up space?
If you install a manual petcock, you have to cap off the port on Carb 6 where the vacuum line starts. Easy-Peasy.
If you want to undo the Pair valves, you need to do a "De-smog" procedure on it. Easy if you're a good wrench. Not bad if you're an average wrench, and doable, (albeit nerve wracking) if you're a rookie.