Well, just to throw out another curve ball, your post sounds like what you are building isn't a Mopar? I've read on the Packard forum that Egge cast pistons don't have expansion struts like the factory cast pistons did, and so must be run with a lot more clearance than the factory cast pistons, and for that and maybe other reasons aren't really suitable even for street high performance driving. And so I pulled out one of the cast pistons out of the rebuilt Packard V-8 motor that I picked recently, and the reports were right - no expansion struts. So I'm mulling over whether to use the Egge cast pistons I already have or pay the extra money for forged, even for a true street engine that won't have much over 300 hp.