Sparkplugs looked pretty good. Not black at all. Initial timing is at 12 degrees last I knew. And I actually think the front jets are closer to 62. I won't get some time to tinker until this weekend, but I'll definitely have somethings to look at!
Is that for sure a 650 Holley? If so it must be the spread bore model. 62 jets are pretty big for the front of it because of the small front barrels. I had one on a nearly stock engine and had to run 58 jets. Now if your talking about the Holley list 1850 that's a 600 cfm carb and 62 jets are pretty close for it.
