. Well, he decided to leave the air cleaner off while he was experimenting to save time. Coupled with ignition problems and gas spillage when removing the fuel bowls and making a mess with the gas. He went out for another test run and didn't come back for a long time. We heard sirens and jumped in my Challenger as we were sure the fire trucks were heading towards him. We thought he might of had an accident. Nope, the engine backfired and caught on fire. Melted the 6 pack hood, destroyed the carbs and toasted wiring. Costly mistake with being sloppy with the gas and not running with the air cleaner. His car sat for 6 months before he got enough money and parts to run again. All of us learned important lessons that day.