spark plugs

[2darts]

Ok I bought a 440 to up grade my cuda from the 318, the seller said it was re built.I was taking the plugs out to hook up the exhaust and noticed thay were ac delco 7 they look new except the orange paint. my question is will they work? I can't find anything on line and summit didn't have a listing for a ac delco 7. thanks I found the 7 on summit but no cross reference

 

[js29]

Chrysler products used champion! ac delco are originally used by the general motors corporation. what year do you have and is it an HP engine.

 

[moparleo]

If you are running factory heads, the proper plug is the RJ12YC gapped at .035-.040 for standard electronic ignition. MSD multi-spark HE type of ignition are gapped at .045-.060 .