I have an old clifford 4 bbl intake on my 235 I took out of my 53 Chevy 3100. I bought it in about 1981 when they were Clifford Research. It has a plate on the bottom of the manifold that has 2 copper lines that go to 2 different header pipes and fittings that you drill a hole in the header and weld on. Then it has a spacer plate about 1" thick that goes between the manifold and the carb that runs hot water through it to warm the carb.
