[BNaylor]

High probability you do not have the OEM spark plugs and wires but you never know for sure until you check them out.

Back in 1998 the igntion wires were marked with the name Packard spaced out in intervals and will have the marking for the cylinder (1,2,3,4,5,6) it went to since each length of wire is custom fitted. The AC Delco 7mm Premium Silicone wires that are now recommended for use do not have the cylinder number markings and say AC Delco.

The OEM spark plugs from the factory were probably AC Delco 41-921. These are double platinum meaning both the ground and center electrodes are platinum. The plugs were advertised to be good for at least 100K miles. I have pulled OEM platinum spark plugs of the 41-921 variety at over 90K miles and noted little or no visual wear of the electrodes and the gap was consistent at .060".