Quote: MP makes two 509 lift cams. One has a 108 C/L and is referred to as a street/strip cam and one has a 114 C/L and is for "improved driveability" on the street. Both are old grinds - as compared to what is out there today. Don't know what the rest of you set up is, but your 60 foots, ET and speed all match up well. If you are running the 108, advancing it might show a very slight improvement ( again, depending on your set up - heavy car, tall gear, etc.), but IMO you aren't going to see anything major. Remember, you will only be one step away from rolling in a newer and much improved grind.
If you have never advance a 509 (108) 4 degree you have no idea how much difference it makes "I do" and it's huge. now if you have a 4200 to 4500 stall you will not see as much but a 2800 to 3000 it's huge!!!
Your right, I never have ( or at least don't remember doing it - as I said, that cam has been around almost as long as I have ) Good luck with it and let us know the results.
Good luck with it and let us know the results. 
