All for .370 lift and under ........

273 said

2003 5.2l full size van is rated 13 in town 15 hwy 14 mixed that's after 26 years of Chrysler spending billions looking for better mileage. Don't think you did too bad, useless there's something seriously hindering fuel mileage it's hard to make dramatic improvements and very hard to recoup the cost.

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Absolutely. I believe if I put a TQ on it (which I'm not), I could gain mpg. But, the 318's don't like to push/pull going down the road. My van is about as aerodynamic as a concrete block. I did have a nice gain on part throttle, though. All in all, it was a fantastic project and a lot of fun. Besides, it has fresh heads on it now!