what is the point of adjustable cam gears?
Unless you have decked the heads more than once...or put in aftermarket cams...not much besides looks.
If it was a DOHC engine you can get gains that way....but not on a SOHC. A lot of the DOHC guys like to more the intake and exhaust cams around to find gains. With an SOHC setup you can't move them seperatly without messing with the other.