Wrangler/TJ (1997-Present)
Windshield width 55". Round headlight. Center tailgate mounted spare tire carrier with brake light. Tailgate opens to the side. Measures 81" from door hinge to rear of vehicle.
Wrangler/YJ ('92-'95)
Same as Wrangler models '86 1/2 - '91 except for extended rear sport bar.
Wrangler/YJ ('92-'95)
Windshield width 55". Round fender Jeep, one piece windshield, factory roll bar with horizontal supports. Similar in design to CJ7, but with rectangular headlights and turn signal lights, and a squared off front grille. Comes with either half or full hard doors. Measures 81" from door hinge to rear of vehicle.
CJ7 ('76 - '86)
Windshield width 55". Round fender Jeep, one piece windshield, factory roll bar, bottom mounted windshield wipers, factory mounted door hinges, has either no windshield retainer or screw-in design. Door opening looks like a "U" rather than an inverted "S", measures 81" from door hinge to rear of vehicle.
CJ8/Scrambler ('81-'86) Same basic vehicle as a CJ7 except with an extended rear body tub. Measures 103" from door hinge to rear of vehicle.
CJ5 ('76 - '83)
Windshield width 55", round fender Jeep, one piece windshield, factory roll bar, bottom mounted windshield wipers, factory mounted door hinges, windshield retainer screws on, sloped windshield. Measures 71-1/2" from door hinge to rear of vehicle.
M38A1 ('51 - '71) and
CJ5 ('55 - '75)
Windshield width 59",round fender Jeep, one piece windshield, no factory door hinges, windshield retainer welded on vehicle, windshield at 90 degree angle to hood.
CJ6 ('55 - '75) Same basic vehicle as an early model CJ5 except with an extended rear body tub.
CJ3B ('53 - '64)
Windshield height 22-1/2", hood height 10-1/2" (fender to top pf hood) one piece windshield, has tailgate, bottom mounted windshield wipers, side mounted tire carrier (factory).
CJ3A & M38 ('48 - '53)
Windshield height 27". Flat fenders, one piece windshield, vent in middle of windshield (factory), bottom mounted windshield wipers, hood height 6" (fender to top of hood).
CJ2A ('46 - '49)
Windshield height 25". Flat fenders, one piece windshield, vent in middle of windshield (factory), bottom mounted windshield wipers, hood height 6" (fender to top of hood).
MB ('41 - '45)
Windshield height 23". Flat fenders, split windshield, 9 Vents in grill instead of 7, no tail gate, recessed headlights, top mounted windshield wipers, rear mounted spare tire (factory), hood height 6" (fender to top of hood).
Thanks to Lahore 4WD Club for the Info ( Of which I was a member when I had a Jeep, not an active one though )