im running a 360 in sprinter at funfest any suggestions on gear selections

618 to 624 should be enough of a gear We have ran that gear in a 410 sprinter there . That should be a good gear. Depends on hp of motor and cam but that is a good starting spot. Track will be dry and dusty . Better keep plenty of oil on the Air Filters for all that dust.

Depending what your trying to turn, if it's 7800-8000 I'd guess closer to 6.58-6.65.
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Hey, glad you ask that question. We where wondering where to start also. I will be running a 360 too. See ya there!