yea...pualweldit mentions a good point...i am running rich and have an aditional 10 degrees timing...thats all it will handle though for opt performance...fuel mileage isnt improved a whole lot, but power is noticeable just not a real big gain...just enough to notice it...i also have an electric distributer.


got my 78 merc with a 250 I6 and i love it.