Hi Mr Diesel, I sure would be interested in trying out what you've come up with. I however am a long way from a dyno where I could test. I am so far back in the boonies of WV that it takes till Wednesday to get Saturdays TV shows. I am a autobody tech and have quite a bit of expierence in fabrication, especially sheet metal. Send me some pix. Sounds like this is right down my alley. I am more interested in fuel mileage than more power but I suppose if you tune right you'll get both. I use GPS for odometer and speedometer, should be pretty accurate. Stock one is not accurate due to 8R X 19. 5 wheels and tires. Getting average of abt 22MPG now. Hoping I can improve that some with better air flow. Hope we can come up with something, parts need to be readily available for these wonderfull old trucks.