to accommodate a lower hoodline. However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. Pontiac differed from other GM Divisions and most other manufacturers in producing only a single small block V8, rather than adding a larger big block to its line-up. The external dimensions of all their V8s, from were the same. Engine displacement is a function of bore and stroke. Pontiac's V8s share the same connecting rod length, with the exceptions of the later short deck 301, 265, and 303 Ram Air V. Most Pontiac V8s had an overall length (to the edge of the water pump pulley) of , an overall width of , and a height (not including air cleaner) of . Dry weight ranged from , depending on displacement and year. Most Pontiac engines were painted light blue. The 1958 370" engine and the 1959–60 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. Pontiac in the 1950s was one of a few US manufacturers that did not regularly identify their engine names and sizes with air-cleaner or valve-cover decals. Small-journal engines:1955-1981 287 The V8 engine was introduced for the 1955 model year as the "Strato Streak". Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. This was based on results of over 1 million test miles, which was unheard of at the time. The 287 was an "oversquare" engine with a bore and stroke of , for a total displacement of . Compression ratio was a modest 8.00:1, with valve diameters of (intake) and (exhaust). It was rated @ 4600 rpm and @ 2400 rpm with a two-barrel carburetor, @ 4600 rpm and @ 2800 rpm with the four-barrel carburetor. 317 For 1956 the V8 was bored out to , increasing displacement to . It was offered in the following forms: (with manual transmission) Two-barrel carburetor, 7.9:1 compression, @ 4400 rpm, @ 2800 rpm Four-barrel carburetor, 8.9:1 compression, @ 4800 rpm, @ 2800 rpm (with Hydramatic) Two-barrel carburetor, 8.9:1 compression, @ 4600 rpm, @ 2600 rpm Four-barrel carburetor, 8.9:1 compression, @ 4800 rpm, @ 3000 rpm Two four-barrel carburetors, 10.5:1 compression, @ 5100 rpm, @ 2600 rpm. 347 For 1957 the V8's stroke was increased to , for a displacement of . For the first time, Pontiac offered Tri-Power,