Tom, you cut the pushrods with bolt cutters so you eliminate the hassle of taking off the top end to get to them.
It's a little tricky but it is trick when done.
I've got a Vance and Hines Fuelpac FP3 and I'll be taking a ride today to help dial in the cam. It's close but the FP3 will get it right.
After today the weather turns to shit but I'm hoping for some decent weather but if I have to wait until Spring then so be it.