Hello James, Sorry we did not manufacture for Four Winns in 1987 so we do not have a convertible top available for your boat. However our sister company may be able to get you set up with a universal Bimini Top. You can go online to westlandcovers.com or call customer service at 1-800-835-7992
Yeah I'm almost positive! Call the costumer service line from 8am-5:00pm Monday-Thursday!
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