Tofast4u2c,
With the Cap-X landing gear you should be OK with a 22x8 prop on a paved runway, but on grass it may be a little close. The plane is going to be a missle, because my Brillelli 40GT has unlimited vertical and is very fast with a nXoar 20x8 prop. A 21x8 prop might be a better choes if you fly off of a grass field. Good luck and let us see some video of your plane.
Just to let you know if you get the Cap-x landing gear you will have to cut the gear in half to get it to fit right into the fuselage. I measured the landing gear and look for something that is 8" to 8 1/2" tall. If you can get the gear to be 7 1/2" wide at the base where it mounts to the fuselage you will not have to cut it in half. If it is narrower that 7 1/2" you may have to cut it in half.