expert help needed (my first post)

I have a 440 in my Duster, it was an automatic and I just converted it to a 4 speed. Everything is a tight fit, headers make everything a tighter fit. For mine I had to go with a hydraulic clutch, I couldn't package the linkage for a manual clutch, my headers were in the way. I definitely had more room with the auto. Looks at Schumaker (spelling?) For the conversion motor mounts to bolt a big block in. For oil pans, you'd need an abody friendly one. I ran a big Moroso deep pan, it cleared everything just fine, I currently run a 440 source Hemi pan, it also clears everything, but I had to upgrade to the 73+ steering to clear the pan. I also have a 73+ spool mount K member and am able to run factory C body motor mounts.