I would try: Turn the mixture screw on the carburetor 1.5 turns. Check the outside of the carburetor for false air with brake cleaner. Your air filter box has an inlet rubber that is too large, is not original. The vacuum fuel tap could also be leaking.
I would try: Turn the mixture screw on the carburetor 1.5 turns. Check the outside of the carburetor for false air with brake cleaner. Your air filter box has an inlet rubber that is too large, is not original. The vacuum fuel tap could also be leaking.