what quick change gear

[Deish98]

I'm thankin bout racing charleston speedway this weekend or highland speedway anyone know what size gear should I use for winters quick change 08 larry shaw .406 chevy small block lookin 2 get 7800 to 8200 rpms...if u have any imformation of what size gear I should use for 1 of the 2 tracks plz let me know

[erm11]

633 charleston

650 highland

[Deish98]

Thanks for the help