I took a damaged Mummert 8V EFI intake manifold and cut the top off and milled the body level where the 8V enters the ports. The Weiand TR top was only 1/4" off in the placement of the plenums. I epoxied the 8 holes and blended them into the Mummert lower intake. Flows 365cfm, and made 613.3hp on my 375Y. Thanks to the internet and Cloud moving my pictures around without my input, I cannot find the pictures of the process now. The Y block crankshaft can be modified to fit a 289/302W for a stroke increase, and the bore centers are the same, so the Weiand was very easy to modify to fit the Mummert 8V and work well. Joe-JDC.