Thank you Bob. Very valuable information for me.
Since I'll be using a 6 speed Camaro transmission and stock X-member I must fabricate a new transmission mount anyway.
And yes, the stock X-member is actually wide enough to accept the T56 trans!

The cooling fan I purcased on the local wrecking yard need app 2 3/4" of room.
If I use a short waterpump and place the engine app 1 7/8" further back than stock CE position, it will be app 3/4" of clearance between the fan and the nose on the waterpump.