Great thread, I've been thinking about this all winter and even posted my motor on Racingjunk. I'd like to build a 426 Hemi if I can find parts affordably.
Is a Hemi block more durable than a 400 block?

What would a Hemi weigh with aluminum heads compared to a low deck with aluminum heads?

1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual