I have no idea how many blocks are out there with problems just saying that I know the 2 I've seen run are fine just needed things fixed to make it work for the intended use.I wouldn't think twice about buying and building another.Also I have had 2 R3 stocker engines and they needed quite a bid of work to get ready,it's part of racing a Mopar. This is all we have to work with until someone steps up with another option or,god forbid,we build a chevy

Ray Buckner