Post your favorite Mopar Myth.

RustyRatRod said
The 396 is not the smallest chebbie big block. It's the 366 heavy duty truck engine. Also, the way I heard the older guys at the chebbie dealer where I worked say......In late 69, there were several thousand 396 blocks "accidentally" over bored. Thus, the 402 was born and it replaced the 396 for the 70 model year. In small (Camaro,Nova) Intermediate (Chevelle, Malibu) cars, it was still labeled as the 396, but in big cars and trucks, they got 400 badges. Still under the hood on the emissions decals it said "402 cubic inches".

A friend has a '72 Malibu 400, has the "400" badges on the fenders. Underhood is the LS-3 402 inch big block and emissions decal showing 402 cubic inches.

It wasn't an accidental overbore, the 396 had suffered from valve shrouding with the bigger valve performance heads. Increasing the bore helped alleviate that problem, made it easier to lower compression, and also brought the engine back in line with comparable 400 inch B-O-P offerings.

RustyRatRod said
The 428 and 409 engines were the "W" series engines. The 366-454 were the Mark IV engines. They were different families.

You meant 348? 428 is a Pontiac or a Ford.

And to keep this on topic:

Favorite Mopar myth is that Chrysler invented the Hemi.

Hemi engines were designed and used in early Grand Prix cars in the early 1900's, well before Chrysler existed. One notable example was the 1907 Fiat 130:

(Yes that's right...Fiat was racing with hemis 18 years before Chrysler existed! :D )