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. 413 The RB was used from 1959 to 1965 in cars. It was also used in medium and heavy trucks including truck-tractors such as the C-1000, up until 1979. It has a bore of 4.1875 inches. During that period, it powered almost all Chrysler New Yorker and all Imperial models, and was also available on the lesser Chryslers, Dodge Polara, Dodge Monaco, and Plymouth Fury as an alternative to the B-block 383 and the A-block 318. It was also fitted to some European cars such as the later Facel Vega Facel II. In the 1959 Chrysler 300E the 413 wedge was fitted with inline dual four-barrel carburetors; it was factory-rated at at 5,000 rpm and at 3,600 rpm. In 1960, a long-tube ram induction system was made standard on the Chrysler 300. It continued as standard on the 1961 300-G, and remained on the option sheets for Chrysler 300s through 1964. In 1962, a special version known as the "Max Wedge" was made available for drag racing and street use; this version produced at 5,000 rpm. 426 Wedge Not to be confused with the 426 Hemi, the RB was a wedge-head RB block with a bore. The 426 Wedge served as Chrysler's main performance engine until the introduction of the 426 Hemi. It was initially offered as the "non-catalogued" option S42 in Chryslers (the number of such produced is uncertain), offered with via a single 4-barrel carburetor (11.0:1 or 12.0:1 compression ratio, respectively), or via ram-inducted dual 4-barrel carburetors (with the same compression ratios). For 1963, horsepower ratings would slightly increase (see below), and it became optional in B-bodied Dodges and Plymouths. After 1963, it would be used only in Dodges and Plymouths. The Max Wedge was a race-only version of the 426 Wedge engine offered from the factory. Known as the Super Stock Plymouth and Ramcharger Dodge, the Max Wedge featured high-flow cylinder heads developed through state-of-the-art (at the time) airflow testing. They had 1⅞-inch exhaust valves, which required the cylinder bores to be notched for clearance. The blocks were a special severe-duty casting with larger oil-feed passages than other RB engines, and the blocks were stress-relieved by the factory. Induction came by means