This a original ecg carb from a 1955-1957 ford.They are a direct bolt on for a flathead v/8. I am running one my 53 Victoria. It is a very good upgrade. I ran a comparison with the stock holley 94. I ran 0-40 in 10.92 seconds. On the ecg 0-40 in 9.35 seconds. A nice increase in performance. It has been completely disassembled, cleaned and new parts where required. It has #57 jets and a 7.5 power valve.