The main difference is Late models running 50-100 laps races run gas in the cars for the longer distances. Even they could not hold enough fuel for 50-100 laps if running alcohol. Most teams that run the long races have the motor setup for gas only, while some teams in my area that run both have 2 carbs one for gas and one for alcohol. And as a rule a latemodel can carry more fuel to start with.

Port Royal holds the Tuscarora 50 every year during the Fair week races. Come check it out sometime.

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