Damn! Brainstorm!

If you put one of these engines (603, 606) in a 123, you now have the opportunity to use the more available and easy to find 5-speed manuals with left side starter wart.

...hmmm, I have a 603 and have a good idea where to find one of those 5-speeds. Gawd, whaddawagon that would make.

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Never a dull moment at Berry Hill Farm.