Ted,
Maybe a poor valve seat or a weak valve spring or possiably a sticking valve. Wasn't your motor recently rebuilt. If so was the cam shaft reground or replaced? Slop in the timing chain can give you that needle shake. You have been all over the normal timing stuff.
Chet...
Maybe a poor valve seat or a weak valve spring or possiably a sticking valve. Wasn't your motor recently rebuilt. If so was the cam shaft reground or replaced? Slop in the timing chain can give you that needle shake. You have been all over the normal timing stuff.
Chet...