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SeanU=> dual-carb. manifolds? Yup. => yes they do make aftermarket manifolds. Who? Can you point me to a good source? JimA=> I have often heard that it is counterproductive to try to get => intake manifolds smoothly polished. I'm hip. We won't be polishing them per se, but there's a lot we can do to ensure that we're only getting the right kind of turbulence and the engine is breathing at its best. My engine man has been racing flat-fours for years, and is a real wiz at head flowing and engine balancing. => A taper pin might be best. This sounds like the best engineering. We have to balance the machining hours against the cost of fresh manifolds, of course. Seems like a lot of fairly close-tolerance work. => What carbs are you using? PDSIT 32s => Could you just use the '67 OE DP manifolds? Seems likely. I'd really like to find out what options are available. Steven Ayres, Prescott AZ '66 Type 343 Ghia comwest@well.com