[airdale94]

They used to be desireable, not sure which crowd, but what they did, I think, was put standard deck heads on them. You have to use different push rods, not sure which, because of the deck heighth difference. Not sure what pistons. I thought about doing this at one time and looked into it. Search Google and I'm sure you'll find what your looking for. But yes if done right they are a awesome engine. And the wow factor is really up there. Economically you might be better off with a late gen 454. Got me curious again. I'll look into it and post anything I find interesting.