I have a 5k rebuilt with 20 over piston and cam grind of 262 in my kp36 pick up daily driver. Those are the only modifications to the engine. the exhaust is two inches from manifold back. Thinking of getting a 32/36 Weber, the question; with this set up is it necessary to put on extractors? I currently have stock intake and exhaust manifold and carby off a 3k. I know that generally cam, carby and extractors go together. I live in Central America and getting extractors is not very easy. Any input.... Thanks