[ian_uk1975]

I just started reading the manual and, in the part where it talks about setting idle mixture, it talks about looking for a 20rpm difference in the idle speed. How the hell are you supposed to know if your rpm has changed by 20rpm?! That sort of difference would not be audible (50-100rpm is probably the audible limit) and cammed American V8s aren't exactly the smoothest idling engines around, so the idle has a tendency to jump around (certainly +/- 20rpm) under normal operation anyway.

Cheers,
Ian.