318 Stroker Build

you will have to spin a 318 pretty high to get 300 hp at the rear wheels and in a small cube engine you'll need more cam...there goes your idle and lo speed power.
As suggested try to build for more lo rpm torque.Maybe a comp XE256 for the street in a 318.
if you build the stroker you get more torque quite easy but the bigger cubes will need more head and cam for hp. and may be expensive.
Best to get the mopar build books Rumble suggested!