There is no reason he couldn't play to Amini's level. I certainly don't want to rely on both of those young guys at the same time though.
And lets try to remember that the best o-lineman we have was sidelined all of last year. Kalil is extremely important to the continuity of that line. With Kalil back at center a second year vet at LG, Gross being more comfortable with what he's doing, not trying to help so much, and Bell being another year in, we may just be able to stick the freakishly athletic Kugbilla in and do well.