106 miles one way, 95% hwy, once or twice a week. Car is a 1981 Camaro. I bought it as a body for $350 bucks and proceded to build driver out of parts I had laying around and a $400+ set of Michelin tires.
Had a basically stock 400 s.b. that would best at 23mpg. After several years I tried a bone stock 292 I-6 that I pulled out of an old C-60. All I did to it was make an adapter to put a 2 barrel rochester (1-7/32 venturi) instead of the 1 barrel and add HEI distributor. The 6 would consistently knock down 28mpg on any kind of junk fuel. After a year or so the piston slap got noticeable and not wanting to run it to death I built a 350 for it. Short cam, tight quench and low side clearances, the 350 will do as good as 26 mpg if I run easy. Slightly less mpg but it has it all over the 6 for passing.
Next plan is to go through and build the 292 but with LP pistons for higher compression and a slightly warm cam.
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Today's Featured Article - Converting from 6 Volt to 12 Volt - by Chris Pratt. It's a common problem for old machines especially when the weather starts to dip below 40 and the tractor isn't fired up as often. You are probably used to the 12 volt Diehard, charged with 200 amp alternator of your 3/4 ton that always is ready and always starts. It's this type of experience that brings about the many queries we get for 12-volt conversion kits. Since only a few kits are available (we sell kits for the
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