[lincpimp]

Some answers below.

1. Am I on the right track with my selections?
   
   They look good, only issue would be that the mm may not arm with 14 cells.
2. What motor would be best suited to 14 cell use in hot summer temps? A 7,8,or 9xl?
   
   The 9xl would be your best bet, rpm would be around 30k and it will run the coolest of the 3 motors.
   
3. What gearing should I run to keep the heat down to acceptable levels in the 90F+ summer heat when running in grass?
   
   Stock spur and a 22t 32 pitch pinion, you will need a 5mm bore pinion.
   
4. Will it be somewhat faster than stock?
   
   Should be at least 8mph faster than stock.
   
5. Will it have plenty of torque?
   
   Oh yes!
   
6. How would the run times be compared to stock?
   
   You should have better runtimes, maybe a minute or two. That really depends on the battery quality.