i am running a 6.9 with a7.3 flywheel--(2 piece) with a 4 speed trans from the 6.9 is that ok thanksDid you post on another site? It will depend I think on which tranny you are using. The 6.9 came with the 4 speed. the 7.3 with the 5 speed. You can use the 6.9 flywheel and pressure plate with the 7.3 clutch disc if it is the same size or smaller. You can use the entire set up just depends on trans.