I have an 04 cobra that has an iron bottom end and a few other mods too long to list. Heads are untouched. I have what seems to be a heat issue. I will start the car, it will run fine for a while. But after the car gets completely up to temp and maybe runs for a while it will start ticking and clanking progressively getting worse until I shut off the motor. I have a video of it but I'm having a hard time posting/uploading it from my phone. Any insight on this?