Guys,
This may help in determining which ratio TKO (5th) or Toploader (wide vs close) and the corresponding rear gears.
I will be using 3.5 ratio series third member, and a TKO 600RR with the .82 5th. This combo is real close to 3.5 rear and a wide ratio toploader, plus an extra top gear.
http://www.secondstrike.com/Technical/GearCalc.asp
Regards, Bret.