Good move! I'm not familiar with Texas law but there were some informative posts in this thread. BTW, those aren't rust pits, those are peen marks. Someone tried to obliverate something. Your best bet is to relieve yourself of the burden of that motor. They obviously have you for the number alteration (even if you didn't do it) and I'm sure the penalty will just be a slap on the wrist. As stated, SBC's are a dime a dozen. And, for those advocating that you 'lawyer up'.......forget it! It won't be cost effective. Unfortunately, I've had extensive experience with both criminal and civil attorneys. They're out for one thing...........your money! Nothing but a bunch of blood sucking leeches!! Pull the motor, dump it in the closest mud puddle, grab your coupe and go!