If you do not have the th350 yet - try and find a early 80's one. The TH350C have a lock up converter and will help save a bit of fuel.
One issue may run into is at cruise the airspeed in the intake might be really low which can cause drive ability/fuel metering issue.
Might be better off finding a dual jet off of a 231 V6 from around 1980/83. The Venturi's are smaller and will give better metering.
All the jets/primary needles are the same as the Qjet so parts are around to adjust the fuel curve if needed.
On these you set WOT mixture using the jet and pri needle tip diameter, then set part throttle mixture with the mid and top step of the needles.
