Well I think I will go with Tom's comment and leave it as is for now. The fact that he has a FW that is neutrally balanced ties in with something I read a few years back that suggested later 616 and 617 engines were internally balanced. I cannot find the comment now, but at the time the writer seemed credible.
Anyway, I adjusted the IP timing today and will do another diesel purge in the next few days (did one before restoration started) then just drive it hard for a while and see if things smooth out.
Now if I could just get the speedo to work…….
http://www.peachparts.com/shopforum/showthread.php?t=149823
Thanks for the comments.
John