Carb Tuning / Vacuum Problems?

It was a rental gauge so who knows how accurate. I might rent another one (or just buy one) and check again to see.

There is an adapter under the crab (square bore carb to spread bore manifold), but I just had it off and replaced both seals and they seem to seal fine. Also have sprayed carb cleaner all around the base and no change to the idle so there's probably no vacuum leak. Vacuum tee has been removed and replaced with a plug and sealer tape.

bbeep - thanks, I will keep that in mind. The vacuum seems about in line with yours until I drop it in gear. Honestly I'm not sure how it runs with the vacuum that low in drive.

Hopefully I'll have a chance to try cranking the idle timing up a bit today and move the tach wire back to the proper side of the coil, see if that makes any difference.