after several weeks of frustration my blazer is finally back together and running. Changed the FPR and the 2 fuel lines that run through intake. don't see any leaks seems to be running way better. had to cut the cat off though it was burned up and coming apart after being ran rich for so long. Will be taking it for a test drive tomorrow

 

Cool, glad you found it. Fuel pressure regulator and nut kit leaks are very common on CMFI systems. And yes, it will destroy the converter if not repaired.