Surge problem at speed

I was thinking fuel also or I was really thinking "are you sure it is electrical?" LOL! I had an issue with "vapor lock" it turned out the fuel line was too close to the header on the right frame rail. I pulled it tighter to the rail with mechanics wire and it never happened again. Mine would act like it was out of gas,shut down. id get it off the road,wait 20 minutes and fire it up and go. I would thinlk"air" in the fuel line would cause surge or even erratic fuel pressure.

As an aside, whay are people going with pertronix? what is wrong with MP electronic ignition? I have heard the modules are junk now maybe they always were:) Mine work ok.Orange box.