Intake air pre-heat & other cold start aids

[John Moran]

Yeah, it's me the new guy again; I think this question is different enough to warrant a separate post. For my '72 250 ci I6 I need the duct work that attaches to the exhaust manifold that causes intake air to be heated. I also need a new bimetallic spring for the heat riser. I have looked in about a jillion web sites for this stuff, to no avail. Any one have suggestions? I'd like to drive this thing in the winter.