The Clifford intake is not as good for mileage as compared to the Offy intake
The Clifford intake has huge runners, too much volume.
I would look for a smaller intake manifold.
Do you have an air/fuel ratio gauge?
I would not use such a tight converter as 1600 RPM stall.
What does the 2200 stall converter actually stall to?
Having a lock-up torque converter let’s you have the best of both worlds, acceleration, then will lock up when you want it to for mileage.
A lot of newer cars with V-6’s will have 2200- 2600 stall and still get 28 MPG example 2010 Chevy Malibu 3.6 V-6 6 speed trans.
