I will start with the why I think it will work. If you look at the C&L chart that Mustang5L5 shared, you will see that the recommended tube for 24 lb injectors is the Blue Tube (0.65 IN, 0.555 OUT). It is the recommended tube for both the 73mm and 76mm. This usually means it is a compromise for both MAFs. Using my "crude" calculator I get the Blue Tube on a 73mm is about 7% richer (would be the equivalent to using a 20.3 lb injector on an 100% stock set up) and the Blue Tube on a 76mm is about 3% lean (equivalent to a 18.7 lb injector on 100% stock set up). In both cases not an exact match to 24 lb injectors.More details on how to do it or more details on why I think a 9/16" outlet hole will work?