engine chuggin

I got lost on this thread. It doesn't matter where the vac is pointed. Diss-connect it. Timing cover swaps? think in 72.

Just do this; disconnect vac advance. put a vacuum gauge on intake manifold fitting. Start it, run at idle, move the dissy all over, until, you get the highest reading. That is your initial, that your engine want's.

now, somebody that remembers will chime in, I think it is, on the timing cover swap 40 degrees difference. It's gonna take a 360 balancer tape. Now you have to pull mechanical advance out of the dist, to keep ping and det away.

or, as said, find tdc, file a new mark on balancer, then add tape. Find idle first.