I got 2 carbs off a Wrecker. I had the chance to hear them on the car while it was still cold and they sounded good. No hesitation or missing. Pulled the old ones off and put the new ones on. It took about 1 1/2 hours to do. Started the car up and it has never sounded better in the year that I have owned it.
Upon a quick investigation of the old ones I see that one of the screws in the throttle valve housing was missing and the other three were loose. These are screwed in from the bottom so I guess some previous owner has done a botch up job. there is no way that they can fall out while the carb is in place. I guess that would have caused a vacum loss in their operation.
I would like to thank all who contributed and I will soon start considering my next operation on the rear oil seal which sounds like a biggie.

Peter

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Peter
New Zealand
1974 M B 250