Improve mileage 350 with Quadrajet

[kikkegek]

Hi there,

see my sig for my ride.

I am trying to improve the mileage as much as possible.These are things I have done till now:

- replaced a continuously running cooling-fan (made a hell of noise) with a Flex-fan
- replaced bad spark-plug-cables by new ones
- replaced an open air filter under the hood by a cold air intake from behind the grill

All this stuff is supposed to improve the mileage of my car, but it hasn't improved one bit.

We drive about 60% highway 55mph and 40% city 30 mph. highway rides are all about 8-12 miles per event and every now and then a longer ride of 20-30 miles.

Our average mileage is about 6-6.5 mpg and I think we can do a bit better...

SO....what to do? any advise?