It seemed easier to me at the time to do it that way. The top adapter, which I had made, had a less of of a size drop top to bottom. The machine shop could also use a smaller block of metal to start with. So far no problems. If I had it to do over again, I would spend the extra $ and have done in one piece. The next adapter is going to adapt a Dueljet 210 to the Varajet 2bbl head and will be made in one piece. Another project I would like to try is to open up a 1bbl head as best as possible to see If any improvements can be made like has been done on a "Falcon 6 " head to accept a autolite 2100. Jay