This tool from Unity Manufacturing makes testing your intake tract a breeze. Simply bolt this to your intake manifold, make sure your intake valves are closed, and use a bicycle tire pump or air compressor regulated down to 10 psi. Spray the intake gasket area with soapy water and look for the bubbles. Readjust your clamps and repeat until you don’t have any leaks, then bolt your carb on and go! Made in USA.