There are several issues here with this build that I see.
1) The 920kv motor is a monster - it's heavy, and an 8x6 prop is simply undersized for it. It won't push anywhere near as much thrust as you'd like in that combination; you're looking at a 1.05 thrust/weight ratio - slightly more thrust than what the plane would weigh. It's barely enough to get it flying, with that combination.
2) If you change your prop up to a larger prop that's more appropriate, you'll need to cut the ailerons. While that is possible to do, you will lose control surface area, making the plane less responsive.
3) Putting wheels on a Versa Wing will add drag. Being that you are at your limits with the thrust/weight ratio as it is, adding weight and something that is going to increase drag, I honestly don't think your Versa Wing is going to fly. I think you're going to need to look at either changing your motor to a more efficient motor (say, a 29g, 1300kv motor), or fly it without wheels, or a combination of changing out to a different motor and flying without wheels.
I think if you try to fly with wheels and your motor combination, you're going to find it very frustrating - I'd rather you try it without wheels, at the very least, so that you can succeed with your flights.