hi all,

I did some research for the great pumpkin car, which is a 71, and was told that they are all interchangeable, at least through 78 or 79, or something.  I decided not to cut my firewall, so I never had the opportunity to test fit.  I did look at several units, and they sure looked the same to me.

hey,
 thanks for getting back to me.
why would you have to cut the fire wall?
is the heater box assy W/O air different from the box with air ?
or is the opening the same?
not sure?
if it is what are the opening sizes for the holes?
mine came with no interior or anything mounted to the firewall so i have no idea if it was with or without air.
my wife wants me to put in air ! (hp robber  )
any input from anybody is helpful!
thanks
joe

The A/C cars have a larger hole in the firewall for the evaporator assy to go thru. The non-A/C cars just have a couple of small round holes for the hoses to connect to the heater core.
If your firewall only has the two small holes over on that side, it was not built with A/C. If it did have A/C, and someone just removed the plenum assy, you'd sure as heck know it!! The hole is quite large...you could almost stick your head thru it!

Might have a pic of a firewall with A/C missing...I'll have to look thu a few discs to find them tho...


btw...the assy from the '74 should fit with very few, if any, modifications. However, if you are planning to install A/C in a non-A/C car, you'll have to re-do all of the duct-work under the dash, as well as change the Heater control panel on the shift console, and do some wiring....unless you get the entire A/C system, that is...
A better choice, if Mama just HAS to have A/C, would be to go with one of the aftermarket systems...it'll be a lot easier on you that way. just an idea to consider.Adams' Apple2008-02-12 20:05:23

joel,thanks for that info !would it look something like this?
i think i have air !joe




(modified large image to link)Adams' Apple2008-02-12 21:10:28

 Yeah, what Joel said. Whatever you do, STAY AWAY FROM 'CLASSIC AUTO AIR'!!! Hot Rod Air' and 'Vintage Air' both have pretty good reputations from what I've heard, and you'll have a lot more room under the hood than with the stock A/C.  My 2 cents

Makes lot's o' room without the ole doghouse though, don't it!! I yanked my air out and mounted an aluminum plate there for my ignition and fuel regulator... LukesVette2008-02-12 20:30:02

just bought a unit off e-bay 2 minutes ago




hope it looks good to everyone!
now i will need all the inside ducting for it.
joe

Joe,

hey paul,
nice set up !!
i wasn't going to have any heater or air !! i already had made up a plate like yours to cover the hole! then my wife talked me into both !!! she knows we'll be cruising a lot and wants it for when we take it on trips. i figure i could always take it out later if it bogs me down in HP!
joe