My old school 340 upgrades and results.

318willrun said
I would say by what I heard in the video, and what the symptoms are, it's electrical. I could very well be wrong. It's not fuel delivery, or it wouldn't do it until you are under load. You are running strong for short-shifting it. If it was a cam problem, it would show it's face by the performance it made. I say your electrical system is messed up, and I still say I would just do a MP electronic conversion kit. I've heard of some stories with MSD ignitions giving some problems (not hating on MSD at all). Just say'n.

I agree with you 100 percent. I was going to do valve springs because of age and I probably still will eventually . I do not believe the problem is the springs. I decided this when I took the valve cover off last night and saw what I had. I agree that the fuel system would show itself more so under load. Not at light throttle free Rev.

I just went out to look at the distributer and not sure for sure if it is a Chrysler stock unit. It is similar but not sure. Here is a picture of the pickup.