It's been a while but it's in there. Keep looking. IIRC it's 8 1/2 for the FTS and 10 3/8 for the front (ski) shocks. Presuming you have not had the shocks revalved, when it's all said & done you'll most likely end up tighter (shorter) ont he FTS.
The ski shocks I would set the spring as long as possible. Jack the front of the sled up, loosen the adjusting nut til the retaining collar is loose, tighten the adjusting nut til it snugs the retaining collar up and then put two full turns on adjusting nut. Or at least that's what I did (170 lbs all geared up).
EDIT: I guess I should state it's in the full service manual. It might not be in the owners manual you get with the sled. $70 for the service manual. If it saves you one trip to the dealer it just paid for itself. One guys opinion anayway.