Well I have a red face.I found the miss. I had ran the main power wire from the starter to the ign. switch in a poor location. It was being pinched between the valve cover and the firewall. The insulation was rubbed off and shorting out. Under heavy acceleration the engine torque gave it more clearence and it ran fine.
Thanks to all that gave me info.
"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."
1957 GMC 150
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