Just had a #11 plate installed on my 97 manual with 3.55s. I went with the #11 because the shop I used said that I was going to get into clutch issues if I went with the #10. Oh, 4 inch exhaust and performance intake. As far as I know they went with whatever the stock timing was supposed to be. I felt a pretty good bump in the acceleration (nothing to write home about), pulled a lot better in 4th gear. My problem now is that I'm getting 13mpg when pulling my 21' toy hauler. OUCH!!! What gives? Is this what I can expect or is there something else I can do to improve my fuel mileage? I rarely go over 65mph and realy rarely have a need to go over that, I just want to put on my country music and cruise down the highway without stopping to fuel in every town. For you metal heads country music has no affect on fuel mileage.

 

Timing bump should help the MPG's

 

Also, if you would like a little more power along with mileage, get a nice set of injectors, my cousin put a set of 75 hp injectors in his and gained 3 mpg as well as power.