225 slant 6

Yes, now that you mention it, I believe you're right.

No, he isn't—he's not answering the question that was asked, he's talking about the production aluminum Slant-6 engine, which, yes, differs to the iron block. In fact, the Slant-6 as it eventually wound up being produced in iron was originally designed for adequate rigidity and toughness if it had been made out of aluminum. This from "A History of Chrysler Corporation's Slant-Six Engine" by Willem Weertman, who was centrally involved in the design and development of the Slant-6 (Kesteb, did you work with him at that time? What other myths do you remember from back then?)

Here's part of page 19. Subsequent pages contain additional comments on the matter, such as "With the aluminum versions determining the major features of the design of the cylinder blocks, the cast iron block designs became straightforward with a closed top deck and full length water jacket."

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