Henry there is no Auldey Rx7, and i belive the only rx7 Radican is the Intial D ones...
freak in fact, everything is swapable except for the motor case and steering arms
the motor case is a different shape, but u can take the motor and axle out of it and put it into an Auldey case
the steering arm is strange, youd have to widen the Auldey steering cover for them to fit, but im not going to go through the trouble to do that.
Also, the RadiCan is FASTER than my Auldey with faster motor and higher gearing ratio, in a 20ft drag on wood floor the radican won by 3 feet

, if i were using my a pure stock auldey the radican would have won probably by 5 feet
the reason why it might be faster is maybe the pinion gear, its made out of...umm copper im guessing, not plastic...and the axle wasnt even greased up, just the pinion gears were.....just wait till i grease this sucker down