IMHO,I would not do it,to much wires/work/issues

i would just get a 4-v intake and good carb and be done with the BBD carb on it.

I have put many stock intakes with a 70s q-jet on them and dial the tune in and get 19-10 mpgs ot of a 318 in my trucks.

just pulled a tbi set up off a 91 318 and stuck a voodoo roller cam in it for my 85 truck,back to 19 mpgs and some HP for street duty

I would swap to the 89 engine and go roller cam in the newport with a small 4-v and headers or mannys and duels