I been doin it almost forty years with no balance involved. Tried to explain how here but got beat on by the big "pro" drive shaft guys, so I shut the hell up.
I have done a half a million other projects similar, bet never shortened a driveline before this.
Rob,
That cam was a pick man, and the engine sounds so nice and it runs.
I'd be pretty shocked if it wasn't right a the 13 or so in the quarter mark.
Thank you for the help with it.