New forum group, Nor-Cal Mopars

Here's one, although it's probably too much of a hike:
1971 slant 6 - auto parts - by owner - vehicle automotive sale

Or better, email Doug Dutra - he is THE slant six guru and is in... Santa Rosa!
His email is [email protected]

I'm sure he has a few lying around as I just gave him a running one out of a '71 Duster a few months ago.