pilot hole

It might already have a bushing in it, it might be drilled but not reamed to accept a standard bushing, or it might not be drilled at all, you won't know until you take it apart. If it doesn't have a bushing already in it you can use a bushing for a late 90's truck, it has a large puck that goes into the converter snout. If the crank isnt drilled at all you will have to cut part of the input shaft off and use the truck style bushing.