When did chrysler use a removable bell on an automatic

MoparLeo said

Just a note on post #18, the first 383 was a raised block version, not the more commonly known 383 B low block engine. of the mid-late 60's.

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That is not correct. There indeed was a raised deck (RB) version of the 383 in 59, used in lower line Chryslers. It had the 3.75 stroke of the 413, with a smaller 4.03 bore.

The Dodge 383, however, was the low deck B engine, same 4.25 inch bore and 3.38 stroke as every low deck 383.

Not sure which 383 the DeSoto used. Plymouth did not get the 383 in 59; top engine option for it was the 361 4-barrel.