Used one of these on Shelley back in college and distinctly remember getting 20 mpg. Nowadays she only gets about 16.5 and that's with 3.55 rear end and only 30K on rebuilt engine.

The only difference was, I was probably driving slower back then because the speedo didn't work, and I was running Amoco premium because I could get it cheap (my dad ran a gas station).

You guys think they work??

Matthew 6:33

1952 Chevy 1/2-ton 3100
Late '55 235/SM420/torque tube 3.55
Dalton Highway survivor (using original 216)
www.truckwithaheart.com