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I have been keeping track of fuel consumption.
When I first bought this rig, it was getting consistent 16MPG. The exhaust system was so small, it might as well have been welded shut
The carb was also JUNK. The jet valves were leaking oil into the cylinders and the timing was retarded.
New headers, large exhaust, rest timing and replaced the carb with a Weber 38/38. Also eliminated the jet valves.
The last three times I've filled the truck with fuel, it has been getting 20 to 21 MPG. No oil consumption at all. It does puff a small cloud once in a while, but nothing like it did when I first bought it.

I may have mentioned that I found an 86 Mighty Max with A/C. I removed everything but the compressor. Mistake. The engine in the truck was the twin exhaust port 2.0 where mine is the Astron 2.0 even port. I installed the evaporator inside the truck, as well as the dash fascia, (it has the A/C control printings on the front) and went to install the condenser.
Well... no cigar.
Apparently, the radiator support is different from 79 to 86. I had to cut the top condenser mounts off, then cut the bottom mounts off and re-position them so the condenser sits lower on the mounts. I'm still in the middle of that. I hope to have the install completed today and re-install the grille.
The truck looks like and old skool hockey player missing front teeth...
I haven't figured out what I'm going to do for the compressor mounts. I'll buy a new compressor, and looking on eBay and Rock Auto, they are about $225.
Some ahole on ebay wants $250 for a ratty looking used one. Imbecile!
Anyway, if anyone reading this has the compressor mounts and the idler pulley assemblies, please PM me.