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In 1968, the small-block Ford stroke was increased from 2.87 in (72.9 mm) to 3 in (76.2 mm), giving a total displacement of 4,942 cc (4.9 L; 301.6 cu in). The connecting rods were shortened to allow the use of the same pistons as the 289. The new 302 replaced the 289 early in the 1968 model year.
The TE50 and TL50 models were equipped with a 200 kW (270 hp) version, whilst the TS50 gained aluminium cylinder heads, a larger throttle body and a revised camshaft to produce 220 kW (300 hp). [22] The TE50 was available with a 5-speed manual or optional 4-speed automatic transmission. This transmission was the only choice on the TS50 and TL50.
The head is machined flat, with recesses only for inlet and exhaust valves, spark plugs, injectors and so on. The combustion chamber itself is contained within a dished depression in the top of the piston. The Heron head is suitable for petrol and diesel engines, for ohv and ohc valve-gear, and for small and large engine displacement capacities.
The 4V heads had enormous ports which flowed very well, in particular at higher valve lift, and could out-flow Chevrolet Double Hump heads and Chrysler's high-performance 340 heads. [4] In addition to the two port sizes, the 335 cylinder heads used two style of combustion chambers, an open or a closed "quench" chamber.
This design also relocated the water outlet from the front of the heads to the top center of the heads. These, designated V8-78, were offered with standard 6.2:1 compression aluminum or 7.5:1 compression iron cylinder heads , rated at 85 hp (63 kW) and 144 lb⋅ft (195 N⋅m) (aluminum) or 94 hp (70 kW) (iron). [ 19 ]
A 1964 Rambler American with a 195.6 OHV engine. American Motors' first straight-six engine was the 196 cubic inch (195.6 cu in (3.2 L)) six produced from 1952 through 1965, initially as a flathead (L-head) side-valve, and later an overhead valve (OHV) version.