spark plugs

Not really knowing your combo or usage... I'll say sure, go for it. I do remember it is a nice build, on the hot side IIRC. But a cooler plug is what you want, not a step up in heat.

My reply was what I do. Why?

1. Champs are cheap.

At a $1.88 here, I can afford to make a mistake, walk back to the store and get more. Try the heat range and run about with them. Gap, re gap, gap again.

2. I have no problem with Champ plugs. While they do not last as long as other plugs, the state of tune is key to there life. They always start up my fresh engines and I have several sets on hand when I start up a new engine.

At track time, I bring along 2 set (16) of plugs. The drive there is dicey on traffic. Ya just never know. Traveling 50 miles to the city (NYC) then 20 miles getting threw the city....then into N.J. for a E-town shake down, well, I have kicked the plugs arse sometimes. New set goes in before the run.

If it was a bad day, new plugs on the way home.

Most people do not realize that the engine will do fine with the OE heat range, reach and style it came with. Going 1 step cooler is about the best you can do for a high performance engine. (Above stock high performance) to a fairly hot street machine

On my iron headed 10-1 360 with the same cam you have, the purple 292, I ran 1 heat range down with nice results. Maybe I missed something with the OE range? IDK.

I hope this helps you out. When the time comes, run it at the track and see what the engine likes best.