Seeing as tho I just replaced my German centrifugal-advance only 009 dizzy with a stock 005 SVDA (single-vacuum dual advance... ie vacuum and centrifugal advance), I figure I might as well take the time to give a meaningful comparison. I have been going to replace the late German 009 in BC for ages, and seeing as tho George had the required 005 to put in its place I figure what better time to do the swap than the present! I took the distributors out of George and BC yesterday and found the 005 to be rather worn by comparison... all the same I cleaned it up, replaced the points with fresh ones for good measure, and put the unit into BC and see if it made any difference to the engines characteristics. To put it simply, the difference was extraordinary... and very very positive! Where before, BC would stumble from a standstill, she now moves effortlessly on take off and smoother than a baby's butt... despite the 005 being rather worn out. There is no longer a huge flat spot if the timing is even half a degree retarded or if the engine is cold. SIgnificant application of throttle at medium to high revs also instantly lost it's characteristic violent 009 jerkiness... and light throttle applications at speed became far more productive. And best of all, I now no longer have to put the gas pedal through the floor to gather momentum... I reached 90k's easily without any need for heavy throttle, and also can now sit on 90k's comfortably with the pedal barely depressed and hardly having to move it. So in short, if you have a 009 in your bus, even if you think it seems adequate, the best thing you can do is ditch it and get a stock Bosch 005 or similar, or the new replacement made I believe by Bremi...unless you have a reason to keep the 009 there that is (running aftermarket carbs lacking a vaccuum takeoff for instance). I thought mine was adequate too until I drove with vacuum advance! SO anyway, there is a nice unbiased and objective pro-vacuum advance spiel to chew on. ANyway...I have a 014 to dismantle! Cheers!