What BL motor for Wheely King?

[skellyo]

Anyone have any idea what motor I should buy for my Wheely King? I've got a spare Mamba Max sitting here and it's dying to be installed in the WK. There is no slipper clutch on the WK and it's got a silly high gear ratio. Guys running modified brushed motors like 17T are only getting into the 20mph range. I'm thinking about maybe a MM4600 or a 380C 6L. My only issue is worrying about killing the drivetrain in a hurry without it having a slipper. So what do you guys think?