Re: {Chrysler 300} 56 300B

One first guess would be the 4 bolt truck type exhaust manifolds on the engine for better breathing than stock, but those could be added by anyone. Maybe lower restriction mufflers as well? If there were items like different carbs, intake, or air cleaner elements to also assist in making the engine breath better, including a different cam grind, or maybe even different heads, I'd expect those part numbers to be listed somewhere in the Chrysler documentation files. I think that's about all one could do without changing bore or stroke.

On Sat, Aug 27, 2022 at 11:53 AM Larry Wood <larryjw7@xxxxxxxxx> wrote:

Thanks for the info.

On Sat, Aug 27, 2022, 11:07 AM John Lazenby <french_fryguy@xxxxxxxxx> wrote:
For years I've had calls with owners of 300Bs stating their car is a 355HP example. I always come back with the same comments. "How do you know this and can you provide documentation?" At that time the discussion always goes "soft" as no one has ever been able to provide such.

Recently in my files I located a factory confidential bulletin regarding this HP upgrade. This document is dated mid June, 1956 which pretty much is after production of the 1956 Letter Cars had completed. Just yesterday I had a long phone conversation with Mark Obermann who maintains the club's micro film and he has never been able to find anything on this option. So my question is why did the bulletin appear after the fact? One can speculate on this but until hard documentation appears it is all "myth" as far as I'm concerned.

Years ago in numerous conversations with the late Gil Cunningham we discussed this topic in great depth. Gil was of the same opinion as me that these changes more than likely went to owners with "race" examples and probably not the general public.

Everyone wants their 300B to be a "special" one but as far as I'm concerned all 300Bs are "special".

John Lazenby
MYC 1955 C300 - 1956 300B

On Saturday, August 27, 2022 at 06:08:44 AM PDT, Larry Wood <larryjw7@xxxxxxxxx> wrote:

Does anyone know how to tell if the Engine is a 340 Horse Power.or a 355 Horsepower?

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