This was used with 1955, 56 and 57 Chevy 235 sixes. The air horn and float bowl have been straightened (jig and heat) and the carburetor has been rebuilt with a new size 57 jet (the jet when I got it had been crudely drilled out to something closer to size 59 or 60). I set the float so it would run slightly lean. If you want me to set it back to the original specs, please let me know and I'll be happy to do that. If you want a size 58 jet with it, I'll gladly include that also. I haven't used this one, but it is clean as it can be and I expect it will work fine. This was one used in the Rochester B & BC study project done last year at the Stovebolt forum and all those are being sold now. $70 plus actual cost of shipping. If questions or if you'd like additional images, please send me an email.