'83 TBird Build

[gsmotorsports]

Ok im scrapping the turbo idea, I wanna just stick with straight motor. Im thinking either 347 or 306. The only reason im thinking 306 is because it would get better mileage... right? This is probably going to be a daily driver and 5 mpg to school and back doesnt sound too great. but if the difference isnt too much between a 306 and 347 mileage wise i would much rather have a 347. and if i were to buy a stroker kit to stroke it to a 347 then could i still use the holley carb, rpm air gap intake, and instead of spending a zillion dollars on the afr's what about the trickflow twisted wedge heads? I heard theyre the next best thing and would save me anywhere from 500 to 1000 dollars on my build...
and dont forget this is going to be more of a street car than anything. so maybe a 331 would handle street better??
just wondering what would give me the best all around motor with PLENTY of power to be happy with.