I seem to have problems with my timing, I'm running chevy tbi on my stock straight six. I was wondering where people are setting their timing at? The toyota shop manual says to set it at 7 btdc, and chevy shop manual says to set it between 15-25 btdc, and DUI, says to set it at 12 btdc. What should be a good number to start with? it seems to be searching when it idles, but when driving it funs great. Ant suggestions?