Well, I did the carburetor swap and had a little improvement. Haven't tuned on the new carb any yet other than idle screw adjustments. Pulled the distributor and it is one of the newer styles where you can limit the advance. I moved it to the middle of the travel slot. Now the advance stops approximately before 30*. I'm going to pull it again and open it up just a little. I'm at about 16* initial. The advance seems to come in very quick also. What should my advance be at 1600? Should total advance be approximately 35*? I checked the vac advance on the dizzy while I had it out by blowing into and sucking on it and I couldn't move air through if either way. So, I think it is ok and not leaking. Putting in hotter plugs this afternoon as well as someone suggested. It's the best I have had it to this point, but still not right. I've checked for vac leaks and found none. I'll plug the brake booster line and see if makes a difference.