Percolation? Heat soak? Don't drive during summer??

Phreakish said

I had a 318 with headers, cam, similar carb and lived in his same city and had very similar issues. No manner of metering rod, jet, or fuel pump changes ever fixed it either. Efi with high pressure fuel delivery did. I found the Edelbrock carbs to quite temperature sensitive and tracked everything with a wbo2 and ir thermometer. I'm not recommending doc go to efi, I'm fact I recommend against it (and said as much), but no matter what I did I could never get rid of the heat related issues with that damn Edelbrock carb. My buddy who's into e bodies always ran holley and never had a single issue... So that's where my experience comes from.

Living with a hot rod in the southwest is a completely different animal than in most places. Hard to believe but true.

Click to expand...

Here let me make some sense of why I think this is utterly ridiculous. So what you're telling me is if you had this car before the invention of EFI for aftermarket you would have never been able to get the car running correct? So back in the seventies and before fuel injection was widely used people couldn't run their cars in the southwest without trouble?...
Remindeds me of when I had a warehouse job about 15 years ago and drove my duster to work in the snow and I had people ask me how I drove that thing in the snow to work because it didn't have front-wheel drive or whatever like modern cars? I said what did you think they did in 1972 not go to work because it was snowing?...
Likely your car running good had absolutely nothing to do with the EFI you put on there but something to do with either another part you change while you were doing that or maybe just a bad ground on the ignition system that was accidentally fixed...