Whaddya think about these plugs?

MidnightSwinger said

I was gonna say it looks right for a stock 70’s 1bbl slant six, but @slantsixdan nailed it. Those early 1945s are junk.

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I've got a '74 slant that came with the 1945. It ran significantly better with a late 60's 1920. No more hesitation upon acceleration.