S.L. - I have a Sun that I believe may have the same panels as yours, except my scope is larger, about like a 21" TV - porbably older. My units are for compression leakdown testing,dwell,rpm,cylinder cancellation, volts, etc. From your picture, looks like similar guages. I have a book with it if you want me to photocopy & send, let me know
[email protected] Bought mine for $150 at a US Post Office auction...roller cabinet came loaded with Jeep stuff. Doesn't have gas analzyer, but does have timing lite. I also have an old DELCO and a Marquette that have gas analyzers, but the SUN has inductive pickups which are easier and Big scope is easier to see from car. Good Luck!
