Wouldn't think twice about it! You can't build a SERK3 from a regular RK. Way too many changes to make. The SERK3 is a GREAT bike with a crappy stock 110 motor. Best RK ever made! No biggie, for 23 grand, you can throw a Jim's 120 in for another 7 if you had to, and still spend no more than a new one was then. And you's have a much better bike than a new one. So there are no concerns there at all! 
Hoist! 
Ditto.. The 110 CVO motor is a POS! at 6K mine had to have jugs and headgaskets,,, at 12K a complete new motor.... at 16k a new cam plate and oil pump... 25 miles on the dealer test drive the .007" of pinion shaft runout ruined another oil pump...so now another complete motor! Harley could not give me a FREE CVO 110 that I would keep! I am selling it and don't know what I will buy in the future.
While we are on the subject: ALL!!!! late model HD pressed on flywheels are JUNK! If you want longjevity you are going to have to get the flywheels welded and Timken bearings installed.
Just say no!!!! dont waste your money, build your own,,, Harley knows how they just won't do it!