If it wasn't built for delivery in California in 1988, it probably does not have state mandated equipment from that time. But I'd check with DMV as to smog rules for that specific vehicle and year. The California rules for passenger cars, trucks, commercial vehicles, RV's etc. are all different, and they differ for each year of manufacture. Even if the MH does not meet requirements today, it may be exempt due to year manufactured, or you may be able to pay the additional "gross polluter" vehicle registration fee, which monetarily is not that bad.
Seeking another Bambi
'08 Honda Ridgeline