Gas Mileage is deplorable

[Mach 1]

My combination is also an AOD, but i have non-lockup, 2800 rpm stall converter and 4.10 gears.

My gas mileage is also very terrible. Its hard for me to get an accurate reading, because my odometer/speedometer is not accurate as I have the speedo gear for a 3.73 installed in the tranny, but im running 4.10s.

I would guess Im getting somewhere between 10- 15 around town, the same on the highway.

This is a good indicator of how inefficient the AOD is, as t-5 guys are getting twice the mileage of us AOD guys with similar engine mods.

Do you have the correct 3.27 speedo gear for your 3.27 gears? And also, tire size will affect the accuracy of your odometer, which can throw off your MPG calculations.

Also sounds like your combination is a little mismatched. you need some gears and a converter for that thing, although this probably wouldnt help your mileage concerns?

Whats the power band of that cam? You should get a converter to stall up into that range. This could help. Sounds like you have some other issues also...stalling when warm, rough idle in nuetral. Get those problems fixed first, then see what happens with your gas mileage.

I would look for fuel leaks everywhere as already mentioned.

Also your vacuum seems a little low for the fairly average size trick flow stage 1 cam, which by the way, should work well with an AOD.

gotta run...good luck