The spring choices part of the Arctic Cat site has a build your own sled section. I built my soon to be F7 SnoPro. In the Specs it says that it has aluminum bodied shocks up front and Cross link rear suspension like the 440 SnoPro has. The non spring order F7 SnoPro does not show aluminum bodied shock and says they have the coupler blocks. Is this true, I hope so. I planned on building my own SnoPro with this stuff. It would be nice if Cat has done it already for me.