No, you need them to be fully threaded up to the head, and even then I don't know if there is enough room on the back side for the bolt to go all the way through. Can you not get a shorter bolt?
Sorta related. It may be helpful to drill out and re-tap threads to a widely available thread. Mine got stripped so I re-tapped to 3/8-16 and I won't ever regret that. If I ever lose the bolts, every local hardware store will have those bolts.