Well as you may have noticed on your GTR, your front wheels sit a little further back then how you wanted i have found away to sort this out, no pics just a diagram from AM with my labels.
DIFFICULTY 2/10
NEEDED:
EVO CHASSIS
EVO LONG SPACER
SUBARU IMPREZA CLIP
OK so i take it you have your front end (with battery pack and board) is dissasembled from the rest of the chassis, put that to one side.
Take your rear end and screw it on to the spacer using the rear mouts on the spacer (extra long).
Maybe hard to see.
Done? OK next grab your front end again and screw your subaru clip on, put the whole chassis together and place your GTR shell on.
OK as you may know the GTR clip is thicker so if you have polystyrene put a thin bit above the suby clip if you want front end a little higher and below if you want it a little lower.
YOUR DONE!
NOTES: Mine was done on a evo chassis.