GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
SBC ,2 degrees for each mark. A stock type motor from mid 70's on with a vac canister.. Disconnect vac hose, and in most cases look for total advance of around 32 degrees at 2500- 3000 rpm. Thats just a general guide line , don't know what type of sbc you have......cheers