Diff gear recommendations

Your cam may be too big for lo end street performance and your rear tires too tall.
A stock style cam and stock rims / tires will probably get you what you want
This will pin you in your seat from 1000 rpm to well past highway speeds with 3.23
gears, be a blast to drive and probably get 20 mpg,
Mopar got the 340 A body cars right. Now if you are going racing you will need some changes