Here is what I am talking about. It won't matter if my engine mounts are in the front holes or rear holes, it has to do with the sliders and the clamshell mounts and their location.
I slid my engine back in the adapters as far as it goes(2" sliders) and its just barely hitting the clamshell. I'm just holding the headers up so they aren't perfect but you get the idea. I can't modify the clamshell because the lock-nut is directly below the area the header is touching and i'm afraid the heat will melt the nylon in the nut after a good heat soak. I also want to wrap the headers in heat wrap so I need room to do that too. So I guess I am going to have to clearance the front tube a little to make this work.... I just hate doing this if I didn't have to...