I seem to recall a post where someone showed how they cut out  and replaced the section . they wanted to be able to raise the tranny strait up and in for easier r and r  , but I cant seem to find it    Fred

Need more info on what your are wanting to do. 

What car and the year?

Lorena, Texas (South of Waco)

sorry .. 55 ford wagon  272 with 3 spd overdrive   Fred

If just R an R trans it makes no sense. Get a factory manual, explains everything.