About 10 years ago, I went to a small show/ swap on the north side of the twin cities. There were only 20 or so cars there and about a doz. swappers. There was a restored '34 Ford semi tractor there with one of these setups on it. According to the owner, these were common on the over the road trucks during the mid '30's. When he started the thing up, it had a really discernible whine to it. As we walked thru the swap area, low and behold, there was one there with out the carb and linkage For $200. NO!! I didn't buy it!! That's one that got away!