I've searched through several (12+ pages) of these posts and haven't found what I'm looking for, so I'm posting it here. I am wondering about rebuilding the N* out of my '95 Caddy Eldo ETC. I've done this with several other engines in my past (mostly Ford's and 4bangers) and was able to squeeze out some extra HP (boring block, bumping up compression, etc.). A buddy of mine that runs a 4banger turbo shop says that the N*'s can't be rebuilt, that they are "throw away blocks." Is there any truth to this?