Chrysler’s 1947 Aluminum Head Design

Back in 1947, Chrysler engineer A.J. Rock completed work on a design study for aluminum heads, which would have been unusual for American production cars of the time. Presumably, they would have been used with a light aluminum block. Alcoa was specified as the supplier, as of 1948, at least.

1947 blueprint label

68RT noted that they were using parallel valves, so it was not a Hemi head, though that’s what Chrysler used on their 1951 cars — and what would be the sole Chrysler Corporation V8 design for years to come.

The heads would, unsurprisingly, have been cast. Most of the blueprint is reproduced here — smaller than on the original, because one can’t unfold a web page.

surface instructions

aluminum heads

around ports

exhaust port

heads

aluminum heads

large

wall thickness

For perspective, here is the entire sheet. Not much paper was wasted here.

full sheet

Also see engine creators: Willem WeertmanPete Hagenbuch

Modern Hemis 5.7 Hemi • SRT 6.1 and 6.46.4 Truck Hemi • Supercharged “Hellcat”
Classic Hemis 426 HemiOld Hemi History • 392 Crate HemiDevelopmentPlane Hemi

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