You may find this calculator
Keep in mind you have a pretty high kV motor for 1/8 scale use, so you'll have to gear pretty low. Using that calc, 40-50 mph is a decent starting spoto I guess. Keep in mind that unusual 1/8 buggy internal gear ratio for RC8, though.
As far as lipo batteries go, Zippys from hobbycity.com are very cheap, and may or may not work for your purposes. There are some more brand name choices available for higher price tags, but I'm not an expert in that area.
For the MMM settings, you don't have to do anything unusual. Just use a low/normal timing for the motor and you should be ok.
My best advice would be to pick a random page in the big 1/8 electric scale thread
, and start reading from there. You'll be surprised how informative it is.