[egertk]

My 1977 2.7, which has no smog equipment and SSI's (otherwise stock as far as I know) likes to surge a bit when I decelerate, I can hear/feel it missing sometimes. I just adjusted the valves again, only two were out of spec from the last time I checked them (I do it with each oil change) so I thought I'd take a look at the ignition timing. All ignition components are new within maybe 2000 miles. Timing at idle... is about 5-10 degrees BTDC? It's not falling on any mark on the pulley. My distributor has the vacuum retard diaphragm, timing when I rev it up appears to be ballpark correct, but it bounces around a bit around the 35 mark. I unhooked the vacuum line to the vacuum retard, and plugged a long fresh line on there and sucked... I had to really exert some effort to get it to actually impact the timing though. Points were set to 0.012, and the dwell is reading about 34 degrees right now. It's got the stock CDI box on it. Any ideas? Just from my searching on here and the fact that it takes a lot of vacuum to get the distributor to retard timing I'm suspecting the distributor might be in need of a rebuild? Any other thoughts or suggestions?

If that is the case, what's the best place to send out my distributor to for rebuild?
Thanks!