finally it looks like V-8 time

If the HT-284-2 is 284/284 .450 lift, thats quite a bit of cam for a 318,
especially if your using 2.94/3.23 gears.

You might be better with a dual pattern cam. ;)

Don't forget whatever cam you use the stock 318 valve springs should be replaced, with the springs that match the cam.

Some people like to use a 340 replacement cam in a 318.

I am using a Mopar Perfomance .430/.450 260/268 duration.

Brand Mopar Performance
Manufacturer's Part Number P4452759
Part Type Camshaft and Lifter Kits
Product Line Mopar Performance Purple Camshaft Kits
Summit Racing Part Number DCC-4452759

Cam Style Hydraulic flat tappet
Basic Operating RPM Range 1,200-5,200
Intake Duration at 050 inch Lift 221
Exhaust Duration at 050 inch Lift 228
Duration at 050 inch Lift 221 int./228 exh.
Advertised Intake Duration 260
Advertised Exhaust Duration 268
Advertised Duration 260 int./268 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.430 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.450 in.
Valve Lift with Factory Rocker Arm Ratio 0.430 int./0.450 exh. lift
Lobe Separation (degrees) 110