man, i need to get a job were you work lol.... looks like the red one might be running bad (black soot on the bed above exhaust)
i dont know for sure, but i believe that you may need an adapter to run a factory carb on that intake (if it had one they took it with the carb) because the factory carburetor has a wider bolt pattern on one side compared to the other and the Weber the bolts are the same distance apart
