Chuck roasts are horrible if not cooked long and slow. Stringy, fatty, tough - that's why they're so good for slow cookers.
That said, you could get away with a 325 oven, a dutch oven (le creuset and similar), for 4ish hours. Do you have enough time now? eek.
You know, though, roasts like this taste fantastic the second day. Why not substitute hot dogs or something easy, lol, for today, cook the roast long and slow, and have it tomorrow?