My rod project involves building up one of these engines and putting it in a 1984 Ford F350 cab / chassis donor truck... engine as built up is stock except for carburetion and ignition. The 2 Stromberg 2-bbls have been replaced by 3 Demon 4-bbls and the very weak WW2 era ignition has been replaced by 2 MSD distributors with 6AL controllers.

With the GAA, its tough to grasp just "how 'big' is 'big?'" Its bigger than (3) Chevy 350s, bigger than (2) Dodge V-10 rams plus an additional PT Cruiser 4, bigger than 2 1/2 Chrysler 426s, etc. If someone had a built-up Boss at 550 cubes, it would only be as big as one of the cylinder banks on the GAA. If somebody had a GM 502 crate motor, you could say, "another 48 cubic inches and you'd be half as big as my Ford." And all the power is right at the bottom end where its needed for street use. How about fuel economy? My trans has a 30% overdrive, and with a converter lockup, an add-on US Gear (0r Gearvendors) 22% overdrive, a 3.54 gearset in the Dana 70, and 265/75x16 tires, the truck will pull around 1080 rpms at 60 mph. I think 5-7 mpg is reasonable, which is in line with many other street rods, especially those with tunnel rams, blowers and / or gears.