Thx John,
Since the Gillig chassis is common to those Marquis model years, I doubt you will find many differences in the dwgs over that period.
We have the 96 Marquis schematics. They were copied as .jpg files so not as legible as pdfs but should be of some help. You can find them in Coach Assist. Access Brochures For Almost All Beaver Coaches, Beaver Motorhome History, Safari Motor Coach Corporation (1994-2006), 1996 Marquis Schematics.
I'll also have a 1995 Patriot set of dwgs. Even though it is a Spartan chassis layout, it is very helpful in understanding the basic layout of the various electrical and other chassis systems during that period as most of these system layouts are identical regardless of chassis mfgr. I thought I had it on Coach Assist but can't seem to locate it now. I'll notify you when I find it or load it if needed after I index it.
Steve