I ran Bosch platinums with good results years ago, but Chuck Senatore at Muscle Motors said he'd seen detonation problems when they were used with multi-strike ignitions. When I switched to a Crane HI-6, I stopped using them because of his comment.

FWIW, Autolite Racing series plugs have worked very well for me since then. Some are available w/ projected tips and all of them have the ground strap cut back to expose the electrode better.