Probably more info than anyone needs
, but it does explain the differences between 67-69 Camaro's pretty well.
1967
The first year of production, the Camaro was available in coupe and convertible body styles with seating for four. Standard seating were front buckets seats and a rear bench, but a front center console (with and without gauges), a front bench seat and a fold-down rear seatback were available as options. The SS (short for Super Sport) package included a special hood and ornamentation, paint stripes, safety-wired fuel cap, SS identification, performance suspension, tires and wheels. Another upgrade was the Rally Sport (RS) package, which included hideaway headlamps operated by electric motors, front valance-mounted parking lamps, rear valance-mounted backup lamps, safety-wired fuel-filler cap, RS identification (unless combined with the SS package), a special black-out grille and other specific trim. Camaros could be ordered with both SS and RS packages, the resulting car having hideaway headlamps, black-out grille and valance mounted parking and backup lamps, but otherwise SS trim, identification and running gear were dominant. About 100 white-on-blue convertibles with this SS/RS trim combination and bearing Indianapolis 500 Pace Car decals were sold to the public. The Z/28 was a mid-year introduction, with production not getting underway until December 29, 1966. Central to the first Z/28 was its 302 cu in. V8 derived by installing a short-stroke crankshaft from a 283 cu in. V8 in a 327 V8 block. This enabled Chevrolet to use the Z/28 for the SCCA's Trans-Am sedan racing series, which at the time had a 305 cu in. (5.0 liter) displacement limit. Available on coupes only, it also included a close-ratio Muncie 4-speed transmission, power-assisted front disc brakes, quick-ratio manual steering, 15x6-inch Rally wheels and red-stripe nylon-chord tires, a heavy-duty cooling system, 3.73:1 final drive, sport suspension and special "runway" hood and deck lid stripes. Also, Z/28s could be ordered with a special plenum air intake and tubular steel exhaust headers. No external badging identified the cars as Z/28s. The RS package could be combined with any Z/28. Other than the Z/28's standard 302, engine choices included the 230 and 250 cu in. inline sixes, two 327 cu in V8s (one 2 bbl, one 4 bbl), the 350 cu in. 4bbl V8 and two 396 big-block V8s. Available transmissions included the synchromesh 3-speed manual, M20 (wide-ratio) and M21 (close-ratio) 4-speed manuals, Powerglide 2-speed automatic and the M40 3-speed Turbo Hydra-matic 400 automatic. Unique to the 1967 models are front vent windows. Also, 1967 Camaros are the only models without side marker lamps. A total of 220,906 1967 Camaros were produced.
1968
Camaro styling was largely a carryover for 1968, with notable changes being the addition of side marker lamps and the deletion of the front vent windows. Cloth and vinyl seat trim were available for the first time in Camaros (in a hound's-tooth pattern). The optional console-mounted auxiliary gauges changed to a two-tier, stacked arrangement and the automatic transmission floor-mounted shifter changed to a "stirrup" design. This was the last year you could order a Camaro with a front bench seat. The RS package continued as before, but its hideaway headlamps were vacuum-operated instead of by electric motors. The Camaro SS package added a 350-hp 396 V8 to its specification sheet and all SS models had a black-painted rear panel. The Z/28 got exterior identification at the leading edge of the front fenders: a "302" insignia early in the model year and a full-blown Z/28 badge later that year. Some 1968 Z/28s had dealer-installed rear disc brakes adapted from the Corvette and a dual-quad cross-ram manifold was sold over-the-counter for Z/28 installation. Again, the RS could be combined with the SS or Z/28 and the Z/28 could not be ordered on convertibles. Underneath, the staggered rear shock absorbers were used to help minimize rear axle hop. And all Camaros equipped with the 350 cu in. and 396 cu in. V8s switched to multi-leaf rear springs. Previous engine and transmission choices continued with a few additions. The mid-level performance 350-hp 396 V8 was new as was a heavy-duty, close ratio M22 "Rock Crusher" 4-speed manual (available only on Z/28 and 375-hp 396) and a Torque Drive manually shifted 2 speed automatic (available on 6-cylinder Camaros only). Chevrolet produced 235,147 1968 Camaros.
1969
Of all the first- and second-generation Camaros, the 1969 model stands alone as the most unique of the bunch. Except for the hood, roof and deck lid, no sheetmetal carried over from 1968. Neither did the instrument panel, which was completely new for 1969 and would change again in 1970. Why did Chevrolet go to all the trouble and expense to freshen the Camaro with a deeply recessed grille and scalloped wheel openings for 1969 when an all-new replacement was due one year later? Truth be known, Chevrolet was locked in a knock-down drag-out battle for the number-one sales position with Ford in the late 1960s and a three-year-old Camaro needed help if it was to gain any ground on archrival Mustang, which was all-new inside and out for 1969. Other elements set the 1969 Camaro apart from all the others. A few hundred 1969 Camaros were factory-equipped with a 427 cu in. V8, either the all-aluminum ZL-1 or iron-block L-72. While the 427 V8 option never appeared on dealer order forms, these could be special-ordered under codes COPO 9560 and COPO 9561. The resulting COPO rat-motor Camaros (COPO standing for Central Office Production Order) are valuable collector items today. Along with the COPO Camaros was an electrically operated cowl induction hood, with a ram air set-up, which could also be ordered on SS and Z/28 models. Also 4-wheel disc brakes (adapted from the Corvette) could be factory-ordered as options on the Z/28 and SS. Headlamp washers made their first and only appearance in 1969, standard on the RS and optional on all other models. Various under-the-skin improvements made their debut in 1969. Single-piston, floating-caliper front disc brakes replaced the corrosion-prone four-piston design of 1967-68. Also new was a steering column mounted ignition lock, variable-ratio power steering and a medium duty, 3-speed Turbo Hydra-matic 350 transmission option for all applications except Z/28 (4-speed manual mandatory) and SS396 (which got the heavy-duty Turbo Hydra-matic 400 when an automatic transmission was specified). Under the hood, the 230 cu in. inline-6 and venerable 327 V8 made their last appearances and a new low-compression 307 cu in. 2-bbl V8 was introduced. And the gas filler neck was moved to a concealed location behind the license plate and beneath the rear bumper. The ever popular Rally Sport option continued to use vacuum-operated hideaway headlamps, but for 1969, new louvered "see-through" headlamp doors were used to permit night driving in the event the doors became stuck in the closed position. For the second time in three years, Camaro was named as the Official Pace Car for the 1969 Indianapolis 500, and Chevrolet commemorated the event by producing 3675 Pace Car replicas. Sold under RPO code Z11, all were orange-on-white SS/RS convertibles. Model year 1969 also marked the last time a convertible would be offered in the Camaro line until 1986. A total of 243,085 1969 Camaros were produced during its extended model year, which ran 18 months--well into the 1970 calendar year.
I'll take a 1969 ZL-1 Camaro please.
Steve