I found the timing mark and it is set at 5 BDC as the manual states for N. America. The carb is a new rebuild manual choke variety. The dwell angle reads 52 degrees. I have no standard air cleaner. The only hose that plugged into the old one was the vent line from the gas tank and it doesn't draw a suction or anything. The PCV works OK, just got through checking it. I was screwing around with the old suction lines (only the EGR and distributor have them) and they need replacement so that should help. It ran better after pushing them on tighter. I replaced the coil and in the process switched the wrong wires to the - and + tension leads. Got those back and it has acceleration again .
There have been no engine tear downs except replacement of head gaskets throughout its life. It is tight and leaks no oil or burns any oil. A very clean exhaust. I just got through with a test drive and it seems strong, just not quite smooth on idle. I'll try to include a photo on the avatar when I get around to getting one.
I certainly appreciate all the help. This old thing will be up and running good again soon I'm sure. Many thanks to all and I'll keep you apprised of the situation.