I bought this carburetor to solve a problem I was having when accelerating my Mopar 440 engine. I tried everything but nothing worked. After much frustration I decided to replace the carburetor with the same model. I replaced the carburetor and it immediately caught fire. Simple was perfect right out of the box. I put the car in a corkscrew and voila - no more tripping! The car ran PERFECTLY, no adjustments were needed. I'm thrilled with the results.