My bad... That was a commons spot for a vac gauge on the full size Pontiacs and I just assumed. Oops.
It happened, not sure how much in the USA, but in Canada alot. The drive to church on Sunday 66 full size Pontiac farm car when I was kid.... inline 6, 3 on the tree, no PS or PB. A friend years back bout the same version but in a 68 Ford...... was the slowest thing to get moving and the most terrifying thing not only to steer after 20MPH, but stopping was!.... my friend got some pretty big arms after driving that daily for a year, and one huge rite leg! Have seen many other plain jane full size older tanks over the years out fitted that way.
He should have let his wife drive it, just to see how it would have tuned her up. Your Pontiacs were half-Chevies, anyway: http://www.classicalpontiac.com/features/feature8.html
No worries buddy. I thought if there were some Poncho guys out there, they might get a kick out of the ad. I went to see it as soon as I saw the ad and the guy was still in bed when I got there. (8:45AM. My bad!) I am still thinking about it but I have enough projects what with the wagon and the COE. Dave