Hi David,
My interest has always leaned towards the efficiency aspect of engine building and figured long ago the 100 mpg carburetor never existed for precisely the reasons you give. It is the thermodynamic efficiency of the engine that is lacking. I have been reading and re-reading your books and articles for years. Your writings have attracted me because you have a penchant to include a little reality as well (gas mileage, driveability and a little cleanliness.) I started my collection with a copy of "How to Rebuild Your Small-Block Chevy" (the original version now quite well thumbed) and have enjoyed your writings since.
I always thought there was lot to be garnered from the smallest details and have also gleaned a number of ideas from your tech articles, "Performance with Economy" and "How to Build Max Performance Chevy Small Blocks" One last thought, I know you said you are planning on giving this information away with enough readers, but just to let you know, I would be happy to pay for it as well.

Please, keep up the great work. Thanks.
Mike