I'm dialing in a new DUI distributor on my 74FJ40 "1.5F" and following the instructions to a "t." The engine is all warmed up, I've got it idling @ 690 with the vacuum hose off and blocked, and the "BB" on the flywheel lines up with the pointer when the adjustable timing light is set at 5 degrees of advance (for a total of 12 degrees BTDC.) So far, so good. For $hits and giggles, I started rotating the dist counterclockwise (advancing it) to see how the engine sounds. It keeps getting better and better, all the way up to 35 degrees of advance! Should I just stop fooling around and leave it at 12 degrees, plug the hoses back in and let er rip? Or is there something going on here? It seems to run smoother and smoother, faster and faster as I keep advancing it...at 12 degrees, it barely wants to stay running. Thanks for the help.