2bbl ball&ball carb. up jet 10%
fresh bottom end good valve job, cut .100" fromhead.
quick advance curve in dist. w/no vacuum advance. timing 38*
2.26 gears
should get 25 city 34 hwy.
also should drop 2 sec. in et.
you can drop two seconds with a slant all day... with nothing more than tuning the engine... my dart ran 20.20 and after 3 months of just playing with it i had a best of 18.3... 25 city isn't likely due to stop and go with those 2.26's... hwy maybe depending on the tq curve