After 1967, tracking Chrysler V8 engine families is easy: LA (small-block), B (low-deck big block), RB (raised-deck big block) and Hemi. Prior to 1967, though, things get a little more complicated, because now you are bringing in the A-series engine, the Poly engines, the early-B big-blocks, and so on and so forth. The A-engine is what we will focus on today…a direct predecessor to the LA engine family, the A-engine series appeared in 1956 with a bang as a Plymouth-only engine line, with the top-of-the-line 303ci mill showing up in the Plymouth Fury, quickly becoming a monster of a mill in the finned era. The 318-A is the most common form, running for ten years between 1957-67, and appearing in not only Plymouths but in other Chrysler products after 1959, Bristol 409 and 410 sports cars through 1969, and Checker Aerobus airport wagons in the early-to-mid Sixties.
Then you have the oddball, the 313-A. Technically a 312.5 cubic inch mill, the 313 was a Canadian and export mill that sported the common 3.31″ stroke paired up with a 3.88 bore. You would find this engine in Canada and Australian cars, as well as Bristol 407s and 408s. In the Bristols, the engine would make 250 horsepower stock with a four-barrel setup. What do you think this rebuilt and restored 313 is making? Take your guesses! Either way, this mill was returning to a 1963 Dodge 330 station wagon, so it should be a solid cruising mill for years to come!