4.7 V8 swap?

every time i have talked about a 4.7 to techs', all they say is that they are complete junk. and i would have to say the same. the reason that it is so exspensive to buy a used 4.7 is because all the ones that winde up in the junkyard are either got a rod knock, bad head gaskets, or completely locked up. so there are not alot of usable ones.