Sailgunner is right, the 88-90 were referred to with the G designation, the most important difference is the shape of the forward cabin. The G slopes down, the T is squared off giving more head room in the forward cabin. There are some other small distinctions, such as round sinks vs. square, rail seats, etc. etc. Must be a big trailer, this boat weighs over 5 tons and has an 11' beam.