Fuel

[firstgenaddict]

Originally Posted by seventieshow

This is a bit dated but most of these places are still around.

http://azmustangs.com/racegas.htm

Some airports won't sell gas to walk ins, some will. The smaller the airport the better. 100LL avgas works well in old cars but will eventually be phased out.

YES it will be phased out HOWEVER the replacement will be AVIATION GRADE 100 octane no lead and ZERO ethanol. Which is great for muscle cars.
The ethanol blend in street high octane fuel is what is causing so many issues with muscle cars, it changes the RVP which leads to boiling fuel in the fuel bowls and ethanol also leans the airfuel mixture as ethanol has 1/3 fewer BTU's as the same volume of gasoline, computer controlled engine can increase the fuel whereas a carb has the jets it has...
For example from 71 -72 the LT1 carb jetting leaned from 70-71 with a 72 primary to 1972 with a 68 primary.
If you are already leaner due to emissions in your carb then running a "lean" fuel the carb will be even leaner and your engine will probably run a little hotter.