Nice Duster, & great wheel choice. Post more pictures!
I believe I'm using the same oil pan as you on my '68 383 Dart. If you are using the one with 187 stamped on the rear 1/2 of it, mine interfered with the center link right where the cutout ends. A little hammer persuasion created the clearance I needed. Hopefully, with your completed installation/mounting, you didn't need to--please report back & let us know what pan you used (is it the 187?), and if your installation gave you the clearance you needed!
Can you show us pictures of the left side of the engine bay & how your manifold fits? It looks like you are using a mid-70's manifold that I used to see on 400's in C-bodies back in the day. But show us how all that looks.
