While I'm at it, there's the fedco 2-342
$29.98 plus shipping at
PartsAmerica.
It's a single-pass with inlet/outlet at opposite corners, 9.5"x6.25"x2", so two 120mm fans per side will fit (I'd just put 'em on the "pull" side, but that's
me)
The inlet and outlet are 5/8" and 3/4", but you can see that the 3/4" part is just a bulge that you'll end up tossing when you cut these down.
The core's for a 69-72 Chevy truck - they called this stuff American
iron for a reason - as in iron block, so very likely copper water contact surface.
The DangerDen core you mentioned above might be slightly longer 6 1/8" x 2" - but these are dimensions
including tanks) and slightly narrower but the fin area is probably
about the same.
Bob
PS: This was
much easier to find than the 6x6x2...