My first Modified... have questions

[loneranger155]

The LEDs are for air fuel ratio monitoring. Should be a button on the wheel you can activate while running and will hold the reading until you can check it in the pits. Check the C&S Carb website . It will have all the info you need on it. Nice little device to monitor if you are right with carb jetting.

[CanMod3d]

I am new also.....my chassis builder told me to run a 4 easy up on the right rear. Would I notice a difference with a 3 -3 ? I'm new to these cars and not sure how much a difference it would make to someone who doesn't know what the car should feel like.