Jeep Strokers

Well I am just about ready to drop stroker in but was looking for some info.
I read somewhere but can't find it that I need to drill out a motor mount bracket hole larger or one of the holes in the block,
If anyone could confirm this and tell me which one and size it would be appreciated,

Thanks

Engine mount bolt you are asking about on the driver's side of the block is a 12mm - 1.25 x 25mm, grade 8.
John