Well if the port size is different, would it hurt if a bigger manifold port was mated to a smaller head port? I assume that spacing is the same. Also, is the deck heigth any different? Would there be issues with the location of the flanges as in where they were pointing?

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'86 420SE Euro
904 Midnight Blue, Gray Velour
Dad bought it new, now I own it.

"A Mercedes-Benz is like a fine wine, it only gets better with age."