I got a reply from Holley:

So if that is true, it would make sense as that is the taller of the Gen3 Quicktime bellhousings. I can also get good pricing on all of Quicktime's bells so just let me know!

Rm-8077 Gen3 to T56 height =6.465"
RM-8081 Gen3 to T56 height = 7.339"

Good info on the hellcat flywheel Silver70! Nice ebay price as well on the Mcleod 6913-07. Unfortunately I can't match his price.

My second T56 Magnum just came in as well and looks great!