I ran it yesterday at 433cfs in my 143R with no problems.
That said, I kept my rig as light and tight as I could and I've rowed that stretch enough to know what to expect at low water.
If you don't know the water that well, or aren't 100% comfortable at these levels I'd advise you sit it out and wait for the flow to come up a bit. If you do go, I'd suggest you leave the Tevas at home and wear some wading boots or sturdy shoes since you're pretty much guaranteed to get stuck in a few spots and will probably have to do a bit of boat dragging in others.
It's not impossible at this flow, but it ain't easy either.