From what you have described, I believe that the vehicle is a Hess & Eisenhardt "Formal Limousine" with a 161" wheelbase. I have a flyer the company produced on this car and have scanned and attaced the specs from the back of this piece for you below. The front of this particular piece of literature shows a side view of the car as well as a small interior picture showing the jump seats. If need be I can scan and send this to you as well. I hope that you find this of some use.
FORMAL LIMOUSINE
Standard Equipment
Four door appearance with six door convenience:
Center doors have exterior handles removed and panels finished off, but doors open from inside con¬ventionally and from outside with electrical button. center door windows drop electrically
Forward facing folding jump seats that seat three people Gooseneck reading lamp in center of rear package tray AM/FM/stereo/cassette mounted in right rear door armrest Rear seat assist straps
Hess & Eisenhardt formal roof with limousine rear window.
blocked out quarter windows, crown molding and padded vinyl top (Hess & Eisenhardt ribbed grain or elk grain)
Fleetwood molding package (belt and rocker moldingsl
Opera lamps on #2 pillar
Double accent pin stripes (choice of colorsl
Heavy duty ride package (high rate coil springs front and rear. heavy duty shock absorbers. heavy duty sway bar, electronic level contrail
Heavy duty brake pads
Heavy duty wheels (11-15x6l
HR78x 15 Load range "0" steel belt radial white wall tires
100 Amp generator
Rear air conditioner and heating unit
Power operated #2 door glass
Power operated #2 door locks
Full trim Pad #2 (arm rest. ash tray, pull handle, courtesy light)
Full cloth headliner
Full size spare tire
Heavy duty sill jack
Hess & Eisenhardt hood ornament
Optional Equipment
Powered privacy partition Intercom
Rear sun-roof
Tinted privacy glass - four doors plus partition and rear window Dual batteries
Thermostatic radiator fan