I have mock up units I can send you to put under the dash and see what you can fit. This way you can try it before you buy it and pick the one that works best for you.
We use both units and have to say the only thing I like better about the GenIV is the controls and how hard it blows. It really is the best unit you can buy on the market today. We use alot of them and have several different controls you can use with them.
let me know if you need any help.
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Chris Fesler
Fesler Built - Scottsdale, AZ
Don't even think of getting the smaller unit if there is a way to make the bigger unit fit. I have the smaller unit in a car and it isn't just a matter of it taking a couple minutes more to cool. It can't keep up ! You run it on high and it blows cold air but not enough air and it ends up 80 degrees and you listen to that fricken fan all day !!!! ARRGH !!!!!
Ya know the Gen IV conversion for your car is cheap and easy to do Charlie, and works with the smotth firewall. It is $750 for the inside care kit. That is all you have to change