Help Choose new Plugs for worked 360

Hey guys, I want to change out the plugs in my 72 Duster and what some opinions on whats the best choice. Heres my specs...

72 Duster 360, 4 speed, 8 3/4 with 3:91's

360 .030 over 10:1 compression
mildly ported J Heads 2.02/1.60
Racer Brown SSH-25 Hydraulic cam (238 duration @ .050 and .485 lift on intake/exhaust with a 108 Lobe separation)
Holley Strip Dominator single plane intake
Quick Fuel 750 DP
Mopar Performance distributer with Crane High 6 Digital Ignition
Timing is 18 at idle and 34 total

Car is quick but lacks a little on the low end, want to switch out the cam and put on a Performer RPM Air Gap once I get some $ together. But for now just tuning her up. What do you guys think for plugs for this motor, its running Champions now, forget the # offhand.

Butch