Here is a description of the numbers/letters. This info came from John Althouse at Marinette.com
On the later model boats (mid 70's) and later, the code is as follows:
Example ALC2S701G889
ALC (Aluminum Cruisers - Builder Code)
2 (32 foot, 8 for 28, 9 for 39, 7 for 37, 1 for 41)
S (Sedan, F for fisherman, D for double(aft cabin), E for express)
701 (hull #)
G8 (month and year the boat was started (July 1988)
89 (year the boat was complete 1989)
Prior to the HIN being put on the transom rub rail, the hull number was just a serial number on a plate on the back side of the closet door. I do not know that the numbers had any specific meaning.
-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors