a displacement. The first 283 motors used the stock 265 blocks. However, the overbore to these blocks resulted in thin cylinder walls. Future 283 blocks were cast to accept the 3.875 bore. Five different versions between and were available, depending on whether a single carb, twin carbs, or fuel injection was used. Horsepower was up a bit each year for 1958, 1959, and 1960. The 1957 Rochester Ramjet mechanical fuel injection version produced an even one hp per one cu in (, an impressive feat at the time. This was the second U.S.-built production V8 to produce one horsepower per cubic inch, after the 1956 Chrysler 300B. Besides being available in the Chevrolet line, it was optional in Checker Taxis beginning in 1965. A version of it that was built by GM Canada was also available in Studebaker vehicles produced in Canada for 1965 and 1966. 307 A version was produced from 1968 through 1973. Engine bore and stroke was . All 307s had large journals to accept the 327's crankshaft. Pistons used with the 307 share the same pin height as the 327 but retaining the 283s bore size (prior to 1968 it was possible to stroke a 283 into a 307 where aftermarket pistons had to be used). 1968-1971 Chevrolet Camaro 1968-1973 Chevrolet Chevelle 1968-1969 Chevrolet Impala 1968-1973 Chevrolet Nova 1971-1972 Pontiac Ventura 1972 Chevrolet C10 4.000 in bore family (1962–2002) Originally intended as the performance block, this engine family through the became an all purpose engine that saw use in many applications from Corvettes to vans. All engines in this family share the same block dimensions and sometimes even the same casting number; the latter meaning engines were of the same block, but with different strokes (e.g. the casting number 3970010 was used by all three engines: 302, 327, and 350). This engine family was updated in 1968 for the use of medium-sized journals. The first engine in this family was the small journal 327 in 1962 and the last being 2000s medium journal 350 in pickup trucks and commercial vehicles. The medium journal 350 was further developed into the Generation II LT1/4 350 in the early 1990s. 302 In 1966, General Motors designed a special engine for the production Z/28 Camaro in order for it to meet the Sports Car Club of America (SCCA) Trans-Am Series road racing rules limiting engine displacement to from 1967 to