I'd get in touch with forestg, here in the forums. He has experience with the Twin Magnacharger set-up. My understanding is, it's very old technology and was always more for show than go. If you want to drive the car a lot, the supercharger is a major headache. This is an early installation too as it's still running Weber side draft carbs. Later installations used EFI. I recall hearing they could only run about 6 lbs of boost.
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