1997 Freightliner with low original 38k miles. CAT 3126 300hp motor with 9 speed EATON. Prior Air Force unit used for Geo Physical survey analysis LAB and CONE penetrating test. Has Thermo King AC unit and multi electrical outlets. Freightliner chassis double framed equipped with a mounted telescoping Geo Physical Field. Chassis has rear air with separated controls regulators and dump valve. Lock differentials. Radio, Cruise, Captains Chairs on air for driver and passenger. CB radio, Brake controller, PTO, inverter, 2 high AMP alternators, etc. Rear box raises up/down has lots of drawers and floor storage. Knowledge of Geophysical lab equipment is limited. 100 gallon tank. All questions welcomed.