Hyper 7 conversion help

I've been doing a lot of looking through all the different threads to try to get a grasp on a good set up. And I have one I'd like to do but would like to get some feed back from all of you to see if I'm going in the right direction.

Car-Hyper 7

Track-140'x84' (front straight is almost all that 140')

Use- Racing (no bashing at all) 20 min qualifing x2, 30 min main

My planned set up- NEU 1515 2D or 1512 2.D/F
MGM Compro 160/18
4s or 5s 5000 mAh

Alot of the other racers are running the OS .21 V-spec's

any help at all would be nice...
Thanks in advance