Good info so far so here is another little bit...I soft mount my engines...I've elected to use an "Articulated Header" (Not my term..Stole it..he he)...It's kinda nice in that it allows for a little mis-alignment, adds an intermediate piece of aluminum for tuning and reduces a little stress on the header (in my opinion)...I use a soft mount for the pipe also available from Dave Brown Products (I messed up the factory o-ring so the rubber band as a temporary substitute)
I realize mine is a rear exhaust set-up but I plan to do this to all my stuff...
Just a bit more food for thought...