60 mph mamba brushless setup for e-maxx, would this work?

[extremexmods]

I was just looking around and now I see how hard 60 mph is to reach, so I decided to drop my goal down to 50 mph. Could this be reached using 12 cells and the mtroniks genesis truck combo? Mtroniks claims 80kph on their website, which converts to 50 mph. Just how accurate are their claims? I hear their customer service is great. What size feigao motor is this equal to, and what size shaft does it have? The website says 600 size motor, but how does that compare to 540XL? Would this be a good setup for a stock e-maxx? I have decided to stay with a stock length chassis setup so I can keep using my rollcage. I am using the 2 speed transmission, I will not always be in second gear, but will spend most time in first gear and shift in to second only when I decide to go for a short speed run. I am seriously considering this combo, anyone who has it (Mtroniks Genesis Truck esc and Mtroniks Plasma Truck 600 motor) please tell me if I will need 5mm pinions or 1/8" pinions. Also, would this motor work with the rc monster heat sink motor clamp? Also, would this motor fit the stock e-maxx mounting plate? This setup also is attractive to me with the waterproof esc because I live in an area that has lot of rainy days (over 200 per year), and I want to have plenty of days to drive my truck.

[extremexmods]

Can anyone reply? Thanks.