Radiator clearance help

Professor Fate said

No, factory didn't always use a clutch fan. Most times they didn't. Never saw a factory one until the '70s, but not saying they weren't out there. NONE of my '68 GTSs had them- 3 340s, 1 383; a '66 AC wagon, a '66 Valiant 270, a '69 Swinger, and others... all factory.
That said, there's no reason not to run fan clutches if you can fit one in. Fact is, you can't always. No crime if you can't.

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Yeah, my 67 Hemi originally had a solid fan. So did my 69 Cuda 383 4-speed. But my parents' 71 Duster 340 3-speed manual had a clutch fan, as did my 73 Duster 340 automatic. I'm not gonna try to look up all the possibilities, but I think early to mid sixties clutch fans were rare in non-A/C cars, but became much more common as the sixties progressed, including (I think) all Hemi cars from 68 on.

BTW, my 65 Barracuda, above, post #2 (originally Commando 273 4-speed), didn't come with a clutch fan; that was a later addition.