This tells me you don't really understand the differences between the 3-4 and 4-3.
What the 3-4 calls "ends" are roughly equivalent to 4-3 tackles. Big boys to clog up the middle. Moving (most of) them outside is a recipe for disaster. They lack speed for outside contain and the moves to be a legitimate pass rusher. Neal would probably be okay at it, because he can apparently play alright almost anywhere up front. The only other real, 7-9 technique players we have are our OLBs. Datonne played in a 3-4 in college. He's not going to magically turn into a edge rusher.
Which moves us along. 3-4 OLBs are 4-3 ends. If we had our guys healthy, (Matthews and Perry), they're the ones to play 4-3 end. Even then, Mulumbo and Palmer are converted 4-3 ends. Those guys converted to 3-4 OLB because they were undersized. Remember: 3-4 OLBs have more in common with 4-3 ends that any player. Consider them "stand up defensive ends" if you must.
Which brings us to 4-3 linebackers. Hawk is really the only one that projects cleanly and even then, I'm not sure where the right place to put every one. Jones would probably do alright at SAM, but would Hawk be a better MIKE or WILL? He was a WILL in our most recent 4-3, but which 4-3 we'd play matters. I'd guess MIKE for Hawk, as that's the closest position to what he plays now, but that leaves a HUGE gap at WILL. That's your playmaker, under-sized, pass covering, clean up guy who gets a lot of tackles. No one on our roster projects there, except maybe Barrington? But now we have a new problem--we're short on that class of player. Jones, Barrington, and Hawk, and Lattimore are it. One injury and we're in trouble. Yes, Jones and Lattimore made the transition from OLB to ILB in our scheme. But that's more because they weren't particularly good OLBs.
It sucks we're light at OLB for this game, but flipping to a 4-3 would hurt us more. What I could see us doing is using a 3-3 nickel package. Put the three best rushing linemen we have (Jones, Daniels, and Raji?), 2 ILBs, and 1 OLB to rove and pick his spot.