No Rev Limit??

I got my 93 running the other night after a 2 year build. Getting overly excited (plus lack of sleep and a little alcohol), I wanted to see where the rev limit was going to be, thinking it was going to stop at 6250. I have a A9L ECM, and I pulled all my wiring (headlight to tail light) from a 93 GT. When I stabbed the throttle it buried the tach before I could stop it. I have a 2001 GT dash swap and I am using the Cluster from a 95 GT, and using the factory tach. It went WAY past 7k on the tach. It idles around 750. Is something wrong here?? Just wondered. Also I am using aftermarket springs on my heads, and there didn't seem to be any valve float.

No it didn't sound like it was hitting a limiter of any kind. Just kept climbing. During the wiring phase of this thing I checked the stock against an autometer, using the tach test option of my mallory ignition box, both read the same. So I don't know if this ECM has been reflashed or something...