I did a short test but it didn't turnout as good as I would have hoped. It started to rain so I wasn't able to get a better video done. The frame rate of the camera makes reading the A/F gauge almost impossible. The original main body is a 650 4777-7 with a 2 corner idle. The secondary metering block has no option for a power valve. I've got the idle mixture screws set at 1 1/2 turn out. Initial timing is 22 deg and full advance is 34. I made my own bushing to give me 12 deg of advance. I have a MSD 6AL with their 8545 distributor with a heavy silver and light silver springs. The cam is a Comp XE275HL with 231/237 @ .050 installed at 106. I think I answered all of the questions that wouldn't be answered in the video.
Honestly, I couldn't hear any tip in issues, but my wife says I'm as deaf as a board. From what I THINK I saw, you are well over 15 inches of vacuum at that cruise RPM. Whether it's the issue or not, I think you need to open the power valve sooner, and work on cleaning up the cruise A/F ratio.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
