Clutch size on on gen 3 crate engine

He says it depends upon the bell housing you use. Most people use the Quicktime bell because it's smaller and fits the tunnel better. the Challenger bell is huge. Quicktime is about 10.5".
Yes I am aware that you can use a 10.5 or 11” . My question is on a new 6.4 crate engine it comes with a flywheel and clutch. Need to know what size the engine comes with?