Chrysler also wanted a 383 cubic inch engine, to avoid having a smaller engine than the lesser Dodge. Trenton Engine, at the time, had a line for the B engine and one for the RB; the B line was busy pushing out 383s and 361s, while the RB line was underused, producing just the 413. Chrysler engineers created a 383 engine out of the RB 413 block, with a narrower bore — so there was a large-bore, short-stroke Dodge 383 and a small-bore, long-stroke Chrysler “Golden Lion” 383.
The 383 RB was only available in 1959 and 1960 on the US-built Chrysler Windsor and Saratoga (thanks, Ian Smale and Bill Watson). In 1961, the plant figured out how to quickly switch from one block to the other, and they dropped the RB 383.
