i just registerded here today i need some information becuase im thinking of doing an engine swap depending on how much work will be involved. here it is, since the LTZ impala has the 3900 and the SS has the 5.3l V8 i was wondering the engine/trans mounts the same for the 3.9l V6 and the 5.3l v8? im not sure what trans is in the LTZ but i know the 06' SS has the 4t65e trans. i would think that GM would try to keep everything similar for production purposes. i figure if the mounts are the same or similar that will make it easier to do a possible swap. but the 5.3l wont be going into a LTZ impala, i will try to get it in a G6. i know they both on the same ellipson platform. thanks