Some pictures via the FBI skunkworks...
First, the open deck solution...
Haibeck's caged sleeves: Aluminum cage is machined from a single billet of aluminum
Then the cage is welded to the block and machined to form a home for the BIG sleeves.
Top view of the Haibeck 441 open deck LT5. Notice the steels sleeve liners and the cage surrounding them. This configuration offers exceptional stability and durability and oil consumption control.
Frank U has the Haibeck 441 and (last I heard) has over 30k miles on it and it makes gobs of power in all the right places, seen here...
(Continued)