looked and still looking for a Thread or how to... to show me what all i need to cut off the 4l80E to get into an Fbody would really like photo's. if anyone could help me track down photo's that would be sweet... Thank you really appreciated!!!!

 

You need to cut the "Ears" off the Bellhousing, A Sawzall or portable band saw work best.

Here some pics from a '99 4L80E in my Core pile. The Yellow lines are where it needs to be cut.

This Core has a "Lifting Eye" that is usually cut off at the factory, If your has one it will need a trim too.

 

Forgot, If your using a Later core with a "Long" Shift Shaft.....Swap it for a "Short" one from a '91-'94 4L80E.