Okay, I'll ask as I don't know much about the Longchamp, does it run a 302 or 351 (if the latter a W or C)? I bet it's already good for unleaded, when we switched over in the UK it was pretty much a case of ignition timing changes. Being an Americn V8 I would have thought it to have been set up for unleaded anyway?
BTW, nice Avatar with the wide low stance from the rear.
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