rstclark

done

John

 Sorry I missed your question about the 123 tune

 Just read the instructions that came with it and read the long thread a couple of times

The most difficult part is setting up the curves. The Light they talk about that denotes TDC I never could find. I think it is on the exterior of the distributor and shines down on the engine. You don't even need it.  Just get it close and crank the motor until it fires   It helps to have a friend twisting the distributor to get it to start but I've done by myself by just making small changes in the  distributor  until it will run by itself  Then you can tune it by hand to find a good idle. I never really checked the actual static timing. I just found the best idle and went from there  I know my motor is using a lot of advance at 3500 RPM   Also The wiring instructions are a little vague about the switch for the second curve but you can figure this out.

Remember this, A Lean mixture like at idle and cruse take longer to burn  hence you need to light the match sooner   This is where the vacuum advance  comes in under low load situations.  If all you did was drag race at full wide open throttle all the time you wouldn't need vacuum advance.  The vacuum curve has the motor already set to go when you transition from cruise  to wide open.

Give it a go   read a search thread about setting timing to get comfortable with how to find top dead center and set the distributor. 

 Once you have done it you will be proud of yourself

Best regards

Rob

thanks my man.  I give it s shot when I get back in town.  Will let you know how it goes.