[JSeery]

If it has never had the casting sand removed you just would not believe how much of it there is in there!!! It is mostly around the rear cylinders (at least on mine). It really is unbelievable. It takes several instruments of mass-destruction to get at it, but well worth the effort. However no idea how you could do it without the block being out of the car. On the engine stand I work on it with wire, long drill bits, etc. and then turn it over ever so often and blow it out. Then worked on it some more. Ended up with quite a pile on the floor.