if you're willing to travel (take the wife shopping for the weekend), there is a big one in Syracuse NY mid March which usually occupies a couple buildings at the Fairgrounds and has tons of race cars (over 80), not customs.
There is a show there in November which is a racing trade show and the National Parts Peddler auction.
Gawd knows I've been so disappointed in the show at the International Centre in Mississauga where the stock car participation gets less and less every year. Even years ago, we used to go hoping to see maybe 20 oval track cars in a sea of customs and rice rockets. The show put on by Inside Track had a little bit of everything but not a lot of anything specific, was too expensive for admission, and really was preaching to the already converted. Maybe shopping mall shows are the way to go to get potentially new fans interested. Seems to work well in Niagara.
It just seems the internet makes attending these shows less important every season as there are usually folks posting photos of the race cars the same day. Maybe a promoter would be smart to make photographers sign a waver saying they wouldn't post photos until after the show was over.
ps-check the Gater Racing News website re details of the 2013 Syracuse show. Currently the 2012 info is still up
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