ISCA

The annual KOI Cavalcade of Customs is part of the International Show Car Association's schedule. Ths ISCA has been around since 1963 and judges vehicles at certain shows as part of a system through which prizes are given each year. Over 30 shows are held in over 20 different states and also in Canada. If you want to know more about the ISCA, visit their web site at http://www.theisca.com/.
There you can see their schedule and find an even in your area.