Mopar 413/426 Max Wedge block casting number confusion
And the mystery deepens ...
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Why not mention that earlier?
Okay. You have one of the 3. But by itself, it doesn’t mean much. Gotta have more.
Do you have the notches? We know you don’t have the casting numbers. But 2/3 would lend a bit more credibility to your theory. I will give you that.
The 3R means it’s a later run, so end of 1963 model year, so June-August casting most likely.
What’s the webbing look like? 426 max wedges had extra thick webs that they ended up using in the Hemi Block design in 64 and beyond.