Blown 360

Yeah, get any detonation under control. You should be able to do that without a lot of trouble.

If those carbs are going lean in cruise mode, that won't help matters. Even more important to avoid a lean condition in power mode. You'll be much safer starting with a rich mix and then dialing them back.

Spark plugs: Two heat ranges cooler. A spark plugs heat range refers to its ability to dissipate heat from the firing end of the plug and combustion chamber. A colder plug dissipates heat faster. Blowers raise compression and as compression goes up, so does cylinder temperatures. As temperature goes up, so does the chance of detonation. Dyers is the only one I've ever seen recommend two heat ranges hotter - which makes no sense to me. Maybe it's a typo on his site. Worse case, you foul plugs (which I doubt) but that's a lot cheaper than broken/melted pistons.