I was quoted $750 for a 5.3 a couple years ago before starting over.
Ricky, the guy that built the transmission, mentioned he was interested in my 383 for a hot rod/drag car and gave me a couple leads on finding a gen IV engine. I have been considering it since it wouldn't take many changes to make the swap. I guess the 383 holds a certain sentimental value since I built it myself.
We shall see after TCC...