I agree you'd have to be brave to try to get through the red tape to import an Si, but it was supplied with a EPA-legal Ford Mustang 5.0, so there should be no need to pull the engine, right? I know they are street legal in Switzerland, and they are the California of Europe (super strict emissions requirements).
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Charlie McCall
1985 DeTomaso Pantera GT5-S #9375
"Raising Pantera Awareness across Europe"
http://briefcase.yahoo.com/gt5s_1985
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