Wow, I missed a bunch of activity on this post. Glad to hear I don't need to worry about patching up a bunch of holes.
L&L Motor mounts - I thought I read on their site that they claim to locate the engine in the stock position. When I used them, I found that the clutch linkage Z-bar no longer sat level (must have lowered the . I made a thread about knocking out the engine side post and relocating it to level out the Z-bar.
For the fender exit headers, yes, you do need to trim the inner fenders (especially if you don't have a body lift). I am planning to try a used set of plastic liners which will probably need trimmed also. If the melt and warp, I'll take them out.