Hank, They are Zeniths. The bowels bolt on and can be rotated so they can be side draft or down draft. I don't know if they have changeable venturies like some other Zeniths do. I do not remember the model number. I found two at a big carb site online but they were not quite matching and they wanted $600 each. That set is for a Chevy 6 216-235. They are not mine.
