I think what cudafever is referring to is this tachometer that I have that just has two wires and I believe it's ran off of a little generator that's plugged into one of those kind of distributors. My thing is I have all MSD now which of course you know because you've helped me with, but I wouldn't want to go back to a factory distributor just to run this tachometer. But I really like the tachometer I think it's cool as heck...