Allright I think I'm getting this sorted out, you are saying my 1998 magnum cam will not work in my 85 roller block with 360 heads because the cam is not drilled for the standard LA oiling? I need a cam from or designed for the pre magnum roller engines? If that's the case, I will just swap the complete magnum in, but my current exhaust manifolds were designed for an air injection system I believe, so they will not work, correct? Thanks for the help, info on this swap is difficult to find and contradictory at times.