[xlr8tr]

My thought would be if you are going "non-purist", (i.e. non-FE) go all the way with big inches, 521+. I'm just getting used to mine (only been driving it a week) and its a blast. Rev lmiter is 6000 and it seems pretty happy at that number! Idle is about 1,000 and rough, but I like it.

I would like to put this pig on a diet, so an aluminum block option would be good.

My 460 is all iron, and I'm sure there's 200 lbs+ to lose off the front end with aluminum heads and aluminum block, right?