[chrismoore701]

Going back to the other options. It was mentioned to change the vacuum to intake. Remove it and set timing to 10. I can't keep the truck running at 10 degrees. As for the 15 inches. Dads vette has that as well at 15 inches and 0 on the ported for the advance and it runs great. Thinking something is letting go inside. Going to talk to builder this week. Seems like maybe the distributer gear or the internals of it are going bad