hi there guys i swapped over my 2v manifold gear and put on a decent manifold and 600 Holley, i picked up the holley cheap and threw it on without pulling it apart it is fine, doesn't leak or anything.......my engine is a stock 351 C, but i have been told from my mates following me that it is running very rich, especially under full acceleration, i am going to get it tuned properly once i have put a decent exhaust on , but what can i do in the meantime? Go down a couple of jet sizes? Can it run lean then, or will a couple of sizes be fine? And yes it is definately running rich cause it drinks probably twice as much as what it did before. HAHA, anyway thanks in advance.......

not to up to date on holley carbs but from what i remember the front and rear float bowls have a level plug just a plain screw in the side of the bowl remove them and shake the car and fuel should just lap out the holes.
maybe as easy as a needle and se