I installed the accel plugs that come with the kit. I've got 9k miles on them with no ill effects.

I will certainly use an ngk plug when the time comes to swap them out. I use ngks in everything because they simply work...and work well.

 

How are Bosch Super Plus copper plugs?

 

Stick with NGK V-Power and buy a feeler guage and check the gap to 35.
Even though they are pre-set, the gap on one of 6 will be off ....

Good luck Randy

 

I ordered the Bosch Super Plus Copper plugs on Amazon. They were a whole $2.15 each with free shipping. If they don't work better than the Champions that I usually use, then I'll call Bosch and see if I can get my money back. If not, it was a whole $14 lol

 

I don't know. I've had good luck with Champion Coppers on my '87 Cherokee 4.0 and on my '67 GMC pickup 283-V8. I will say that on my wife's Mazda, it ran much better on the Bosch Iridium than the Champion Platinums. I think the older the engine is, the less it matters as they were designed for the plugs of the day.

My $0.02.