Well as of 4 hours ago the 600 is installed haha.
Alot of what I read the 107 loves the 600 but the 117s like the 585 unless decking/adding compression. 107 would have come with a 600 other then sold to Big dog for EPA. Time will tell MPG I dont care about.
My gas mileage really sucks, but well worth the fun factor. My little S&S 107, with the 600 cam and XXX carburetor, gets it Done....Best of luck with your fresh motor, I think you will really enjoy it. JJ