I think you'll be fine. Your run time is going to be pretty short though. Keep a close eye on temps, not because of the battery, but because of the motor. And honestly, if you're going to keep that motor, don't spend too much on batteries because it's going to be insanely fast with a highend pack. There was a noob at my local track with a 7700 but his packs were cheap stick packs and it didn't feel any faster than a 4600.
TLR Racing - ARCS Speedway - B-Fast Racing - Dialed RC - G-Force