10 degrees btdc. It's a Crane cam that's just slightly over stock no overlap, I'll get the book out for the specs. Funny thing is that I haven't had this problem earlier, when I first got it running all was good no idle issues, just a little lower idle vacuum which I attributed to the slightly larger cam. All you know what broke loose when I started tweaking the carb, put a kit in it re-adjusted all the linkage and so on and so on. I got it running pretty good, good vacuum and steady idle, even went out and ate a vette just for fun. :thumblef: This just sort of popped up, changed the pcv valve which help a bit but still having a slight surge and the running temp is up 10-15 degrees.
