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That would be a bit of work. I have a 73 that didn't come with A/C and had to cut the large hole in the pass side of the cab to fit the huge box in there and it took about 2 weeks to line everything up properly and fit everything up right. I'd look close at the pass side fire wall because that box is so big it has to fit VERY close to the edge.
Also the side vent is where it draws fresh air from and I think they are different, even the stock one is tought to line up right in a non a/c cab.
As a side note, I bet you could sell/trade a complete A/C setup and get the right one. I've seen these sell for $300+ in working condition.
The vents are another issue, but you can 'customize' yours to make it work if you wanted to.
Previous response concerned the interior section. You also have to think about the engine compartment. If your engine is original, then it most likely is an FE. The brackets are not going to interchange. You also have to think about the crankshaft pulley since you will need to have an extra belt, and some sort of tensioner for the belt.
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy C intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals, turbos, tips, and 02's
MSD6A w/Blaster Coil
Headlight relay system (Delanty style)
Overhead Mount FM-CD etc.
R-134 A/C system (I'm cool)
If you have a vehicle with all the parts, it isn't to tough to install in a non a/c vehicle. make, model, year, etc. dosn't matter as long as you have an a/c pully set up, and brackets to mount the compressor on. Just cut out the area for the condenser/blower bolt it in, then mix and match parts to make up the rest of the system. The easiest way is a donor vehicle. But, the mix and match can work best (the GM, or import, rotary compressors use less power, and work better than the piston compressors (early Ford, & Chrysler).
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