I shouldn't have typed that response in such a hurry; so many spelling errors.
Anyways, I think Clowney could make do as a 3-4 OLB as long as he isn't asked to cover a whole lot due to his stiffness. On one snap against UNC he stood up and had great speed but the LT went at his legs and had some success slowing him down. In any case, I've grown fond of the 3-4 during Wade's tenure here but if switching to a 4-3 would be a better use of Watt and Clowney I'm all for it.
As far as injuries go I'm not too concerned with Clowney; the bone spurs will need removing but he should be fine after that. We should probably ask Doc about it for a better understanding of how it might affect him, in any case. The fact that Clowney wants to go to the Combine before getting surgery seems to speak to his willingness to prove himself.