I am confused on something and hopefully you all can help. I have seen it listed that I will need and that I wont need a spacer. A couple sites show using the adapter and spacer when bolting a 518 to the back of a Hemi like the one listed first in my pictures. Then some say I only need to run the flywheel adapter like pictured in the 2nd picture. I am hoping someone can shed some light on this for me. And I should be able to used any shifter that will allow for 4 speed detents if I run a manual valve body? right? Thanks for help.