Kind of a loaded question. What kind of information/input do you seek?
I have a 1989 B17G Deluxe. The 1992 model was very similar. As near as I can tell, the 1500 series 17-foot Bigfoot
was made for about 15 years as three different models and with a variety of floor plans (center bath, rear bath, gaucho, etc.). In 1994 Bigfoot went to the 2500 series, 17.5 ft model which was better insulated but heavier. The late-80s/early-90s models seemed to not change much from year to year. There is some helpful information on the model history here:
Bigfoot 17' model history
There is also some useful information (brochures/manuals) in the Document Center here:
Fiberglass RV - Document Center - BigFoot
If you have specific Bigfoot questions, the community here may be able to be a little more helpful rather than providing broad information that may or may not be what you are looking for.