318 cam shaft selection/upgrade for stock engine
One of the smaller Lunati Voodoo grinds would be a good choice.
Something like this
Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 265/265, Lift .454/.454, Mopar, 273-360, Kit
https://m.summitracing.com/parts/lun-80360lk
Basic Operating RPM Range:1,200-5,000
Intake Duration at 050 inch Lift:216
Exhaust Duration at 050 inch Lift:216
Duration at 050 inch Lift:216 int./216 exh.
Advertised Intake Duration:265
Advertised Exhaust Duration:265
Advertised Duration:265 int./265 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.454 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.454 in.
Valve Lift with Factory Rocker Arm Ratio:0.454 int./0.454 exh.
Lobe Separation (degrees):110