Gear drives are not needed on a stock or slightly modified motor, i put them on my old 87 hatch, and only liked them for about 2 months they they become annoying, if you want the blower sound......just need to get one....my .02
Good call Juice. They do indeed get annoying after a while, and have there limitations when it comes to high RPM. Not only that some times you may have to modify the timing cover for a proper fit. Stay away, not worth the money. Better to throw on a good true roller timing chain, from Cloyes, or Comp Cams.