Not to be confused with the 383 B engine, the 383 RB had a 4 ¹⁄₃₂ in (102.4 mm; 4.031 in) bore combined with the long stroke of 3 ³⁄₄-inch (95.3 mm), for a displacement of 383 cu in (6,275 cc).
It was only available in 1959 and 1960 on the US-built Chrysler Windsors and Saratogas; one of Trenton Engine's lines had been converted to the new RB engine (to make the 413), and demand for the 383 B engine was too high for the remaining line.
The solution was to create a 383 RB to fill the gap until the plant figured out how to quickly switch from one block to the other.
Not to be confused with the 383 B engine, the 383 RB had a 4 ¹⁄₃₂ in (102.4 mm; 4.031 in) bore combined with the long stroke of 3 ³⁄₄-inch (95.3 mm), for a displacement of 383 cu in (6,275 cc). It was only available in 1959 and 1960 on the US-built Chrysler Windsors and Saratogas; one of Trenton Engine's lines had been converted to the new RB engine (to make the 413), and demand for the 383 B engine was too high for the remaining line. The solution was to create a 383 RB to fill the gap until the plant figured out how to quickly switch from one block to the other.
Chrysler B engine