[midwestmk2]

There is no real difference..The 5,6,and 7m all use the same blocks they just vary in the stroke and the 7mgte also came with oil squirters in the block..One of the major things you notice are the heads..The 7m went to the 24 valve cylinder heads..The 6m is a 3.0 motor that uses the 7m bottom end with the 5m head..The 6m has its own special crank timing gear to make up for the stroke difference..The front timing covers are also different but still bolt up the same just a slightly different shape casing..The exhaust gaskets are the same shape also..