welocome to the forum Tim...Javelins are real nice cars..what color is it? I'm not sure if there is an I6 for AMC...would u go V6 or I6? I6's are tougher. as for gas mileage, there are methods and projects u can use/make to increase mileage by quite a bit, if your interested....I have made a PCV jar which increased my mileage about 20-30%. Anyways welcome and good luck with the 6 banger...
