Only runs 40 Degrees advanced

I went thru that once but spotted it almost right away. Just an Orange box.
I replaced a faulty factory pick-up and it wouldn't start until I rotated the D a huge amount. Then it wouldn't take throttle. I put the Timing light on it and saw the coil firing all over the place and randomly dropping sparks as I tried to increase the rpm. I had a polarity reversing jumper in the glovebox and a few minutes later was back on the hiway.
When I got home later I compared the freshly installed pick-up to another spare one, and saw that the wire colors were different. That was the AHA!-moment.
All my other SBM distributor pick-ups had one Orange wire. Except the one LeanBurn in the box;which was brown,(or was it gray? now I forget but it wasn't Orange lol), like the one I had installed. Needless to say I put an Orange-wired spare, back in the glovebox.