Mine just got done with S&S 585. 2014 cvo limited. Had the heads done by GMS in Uniontown. He cleaned up the combustion chamber and some intake, checked everything over and had to shim the springs to the right height after port work. Kept stock valves and springs.
Also used adjustable pushrods because I lost a little height (decked .010-015 to make up for what was removed when cleaning up head, keep same volume) He believes the water cooled heads are good on the exhaust. The longer kit pushrods won't work as ss585 is stock base circle. stock pushrods also too long with what was removed during decking and I also used .030 cometic head gasket. I actually put rocker boxes back on and off and pulled the adjustables out to see how close...about .040 shorter than stock.
Used Fueling tappets. Also run the vance and Hines power duals with hi output mufflers (dyno operator said they flow too much and cost me a couple)
Final numbers. 117hp and 129ft/lbs. He runs rear tire at 40 psi to compare bikes closer and determine whether a build has a problem. He said at 50psi, where it is on the road, only adds a couple to final number but makes no difference in the tune. he said the bike is pulling all the way to the end and the torque is nice and flat across. I haven't seen it yet.
Some discussion on the ss585 and se259 will say the 10:1 compression of the kit is too low but Greg at GMS disagrees being the engine is so big. He picked the cam for me when I was looking for an earlier intake close. Either way I ride cross country and didn't want more lift or compression. Sure some was left on table comparing around here. Can't say anything about ride, snowing here
Will