Adding a window/inspection hole in Quicktime or similar scattershield.
If you read the SFI instructions they are hard to follow and contradict specs depending on how you read it.
My understanding is that you can have two 1" holes in the block saver for cooling (bbm needs two for galley plugs ala Lakewood). You are also allowed to have an air gap inspection hole along with the window. Depending on which spec you are following you might need up to 12 bolts for the big window which applies more to 8"+ depth bellhousings that are used with 2 or 3 disc clutches.
The diagram above shows 8 for your typical door car. The document also goes on to speficy the size of the clutch fork hole for a door car to be bigger than a tube car.