After some time away from them I went back & figured out a way to finagle the set-up and really all it took was a small round file (after I got it powder coated the holes were too small for the bolts - and it helps to allow the bolts to come in at more of an angle, seeing as the lights fit just fine w/o the mount).
With the mount angled as much as it can (light front facing downwards, bolt facing toward engine slide in from front) you can slide the whole thing in and when you eventually get it fully seated, are left with a little bit of room for angling/adjustment.
The big rock shields obviously don't fit, but I will figure something out for those later. Just happy to get them in!