Ernie ,
I'm betting any little thing not JUST right would raise a flag or 2 with you on your toys but a simple knock sensor is 1 answer. The turbo or blower boys all live and die by this device. For just a few bucks you can build a devise to install full time or keep in tool box for the next problem child. Here is a link to all info needed to build this text box. You guys running a late model block already have one or at least the mounting hole. I made a test sensor by tapping down center of a 3/8 stud to threads of sensor I had kicking around.
A dyno with gas analizer is best but this works great and timing is most overlooked ADDER on most cars. I squeeze every bit I can get out of engines and this is a freeby. I run about 16 + degrees initial lead or timing on everything and then limit mechanical advance to no more than about 38 or so.
http://www.california.com/~eagle/knock.html