I've done quite a few of these.
The important thing to consider is that the aircraft must meet ALL the same parameters as a US built EAB. i.e. You must be able to show proof that the aircraft is 51% amateur-built with an eligibility statement 8130-12, builders log, etc.
Mel, what if it's a 1953 CESSNA 305A (L-19 warbird). Would it come in as Experimental Exhibition or Standard?