I want to flush the whole system but I have no clue were the 2?? block plugs that are refered to sometimes, my book does not tell location any help would be appreciated.

Thanks Pat

One of the plugs doubles as the knock sensor. The other one is in the exact same place on teh driver's side of the motor. They are each in the block, as low as possible, right above the oil pan rail, about halfway from front to rear.

...and if they've never been out before, you could have a ****** of a time getting them loose.