Switching out AC "suitcase" for reg heater

[lochenjons]

I'm taking out my big huge ac box in my 77 k5 (its not hooked up/i dont need ac anyway/i have no top and usally no doors so its usless nayways) and I have an extra heater box with no ac from a '77 2wd chevy. After I unbolt the ac suitcase/compressor crap, will the heater box or whatever bolt right up and work? Or?

 

[pvfjr]

Pretty sure it's not bolt up. The firewall is cut different, there'll be cutting and welding involved.

 

[boz42]

I just cut my A/C box & put sheetmetal over it. This way it doesn't take up a lot of room & I still have heat.

 

[pauly383]

The cores are in different spots , and the hole in the firewall is larger for the a/c evaporator .

You will need to fill in the firewall first with a patch , then cut the new hole(s) out .

 

[smalltowncowboy]

i am planning on doing the same thing getting rid of the A/C. but i am going to be installing a mojave heater into my truck.