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heater plenum 68

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The P. O. of the boy's 68 coupe had done some interesting things with duct tape behind the underdash A/C unit to fashion a heater plenum of sorts. Although I'm a fan of duct tape, I intend to remedy this. In the NPD catalog, it shows the plastic chamber, but says "w/o AC" for 67-68. Does this mean w/o the indash AC, or does the underdash AC prohibit the use of this plenum? I don't see why the plenum wouldn't work, because it will for 65-66 with the underdash AC unit.


1965 convertible "White Pony", my own lesson in mechanical humility
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