To find out what springs you currently have you will have to measure it. Diameter (ie .375), then you will need to check the degree angle (could be 47*, 77*, etc)
Curt, from FTX Motorsports is the creator of the 5/8" modification. Here is some quotes from PM's between he and I. "It will stiffen things up a bit more during the first part of the travel (top of stroke) which is why it also helps mellow out the weight transfer a bit." "This takes some leverage away over the spring and gives the spring a little more effect at the first part of the travel." "Its free, easy and can always be changed right back if it doesn't work for you!"
Posts 92 and 96 on this thread explain and show this mod.
http://www.snowestonline.com/forum/s...d.php?t=165462
Here is a quick installation set of instructions, I don't think I missed anything. No need to pull the skid. Lift the rear of the sled or put it on a lift to allow the suspension to hang. Then lift the torsion springs off of the lower block to release the spring tension and remove the idler wheels to give you more room to work. Then just remove the bolts holding the scissor in place. Measure back 5/8" and drill new holes on each side. Then put the bolts back in the scissor using the new holes, put the torsion springs back on the lower blocks and re-install the idler wheels. This is a 5-10 minute project, free, and can be returned to stock in minutes.
This is the reference picture I used, not my sled.
