Ride height
 

Can you advise where to set ride height from rear I put 22 mm under
Front is 18mm how to get 22mm ?
Lengthened shocks?
Where do you put height wedge
Pic would help

It depends on the track and surface you are running on.

Carpet 14-15mm.
Astro 15-18mm
grass 18-21mm
for example.

measure under the flat of the chassis at the back under the hangers, and at the front on the flat just after the kickup. measure with the battery and body on ready to race.