Specifications

Year/Model 1980 Cherokee WT (not sure if it's a Chief)
Body Custom Grill using Grand Wagoneer frame and Black Cherokee insert. 
Engine AMC 360 V8
Transmission T18a with 6.32 first gear
Transfer Case  NP208 with 2.72 low range
Front Axle  Dana 44 open knuckle - 6x5.5 - 3.31 open differential
Rear Axle  AMC

 

Info from off-road.com on the 1980 model year Jeep Cherokee:

Engine:
Type Standard Engine: 360 V8 with 2bbl carburettor, with automatic transmission and Quadra-Trac. OHV in line 6, cast iron block and cylinder head.
Bore & Stroke: 3.75 x 3.90 in. Displacement: 258 Cu in.
Compression Ratio: 8.3:1
Horsepower 118 @ 3200 rpm
Torque 205 lb/ft @ 1800 rpm

Chassis:
Features: Separate body and frame, box section side-rails, deep web frame wide flange, lightweight pressed steel with five cross members.

Suspension & Drivetrain:
Front Suspension: 5 leaf semi-elliptical springs 47 in x 2.5 in. Hydraulic double action shock absorbers.
Rear Suspension: 5 leaf semi-elliptical springs 52 in x 2.5 in. Hydraulic double action shock absorbers. Optional: Extra duty Suspension Package, front and rear heavy duty shock absorbers, Smooth Ride Suspension Package with front stabiliser bar.
Front Axle: Dana 44, full floating hypoid open end 3200 lb rating
Rear Axle: Dana 44 semi floating 3200 lb rating. Standard transmission models. New Process 208 part time transfer case. Ratios: 2.6:1; 1.001; Optional Quadra-Trac with New Process 219 transfer case. Ratios: 2.60:1, 1.00:1.
Transmission: All-synchromesh 4 speed Tremec model T-176. Ratios: 3.52:1 ,2.27:1, 1.46:1, 1.00 1 Optional: Chrysler Torque-Flite A-727, 3sreeed automatic. Ratios: 2.45:1, 1.45:1 1.0:1.
Brakes: Type: Hydraulic, front discs and rear drums
Clutch: Single dry plate, 11 inch diameter
Steering: Saginaw recirculating ball. Ratio 24:1 Turns lock to lock: 4.0
Wheels & Tyres: 15 x 6 in., disc type full drop centre 6 stud on 5.5 in. circle. Wide wheel Cherokee model 15 x 8 in.5.5 circle, white painted spoke steel, 15 x 7 in. 6 bolt 5.5 circle aluminium wheels included in Cherokee 'S' package.
Tyres: 1178 x l5B black sidewall. Wide Wheel Cherokee 1178 x 15B black sidewall Mud & Snow. Optional 1178 x 15B white sidewall, H78 x 15 white or black sidewall. Town & Country, H78 x 15 black sidewall Viva with two fibreglass cord belts, P225/756R15 white sidewall Tiempo double steel belted radial. HR78 x 15 white sidewall American Eagle with two Flexten cord belts, HR78 x 15 white sidewall F32 All Weather radials. Wide-wheel Cherokee 10 x 15 All-Terrain Tracker.

Vehicle Dimensions:
Wheelbase: 108.7 in.
Length x Width x Height: 183.50x70x67in. Model 18 Cherokee 79 in. width
Approach/ Departure Angles: 30/21 degrees
Ground Clearance: Front & rear axle - 8.25 in.; transfer case 13 in.
Load space: With seats in position - 45.75x43.1x39in. With rear seat folded - 66.25 x 43 x 39 in.
Turning circle: 37.7in. Model 17-39.4in.
Fuel Tank: 21.3 gallon
Seating Capacity: 6 passengers

Instrumentation:
Oil pressure, engine coolant temperature, and voltmeter gauges, speedometer, odometer, warning lights for brake system warning, hazard lights operation, Quadra-Trac lockout indicator (if equipped).

Options:
Power steering, Automatic transmission, limited slip rear differential, AM radio, AM AM/FM stereo, AM/FM with tape, AM/FM with CB radio, Moonroof, ‘S’ Package (Cherokee Model 16 & 17).
Cherokee Chief Package, Laredo Package, 360 cu in. V8, heavy duty battery, rear window demister, air conditioning, power tailgate window, roof rack, inside spare tyre mount, & cover, Visibility Package, Convenience Package, Light Package, Extra-duty Suspension Package, Snow Boss Package, Trailer Towing Package.

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