make sure before you install 2.3HO manifold you slot out the mounting holes for the studs and drill the holes lower for the bolts above the studs, and also modify the shape of each port to somewhat match the 2.4's B shape ports, like this:
Also, for a write up on how to do this correctly, here's a couple links to 2 different articles:
http://www.ny-jbodies.org/library/engine/2...od/2.3homod.asp
For this one you have to register...only takes a minute
http://www.quad4forums.com/forums/showthre...d287d49b0f26d2d