The sweep width is over twice what it should be for a .550" net valve lift. The off center pattern won't be an issue. The roller should be at exactly the same place with the valve on the seat, as it is with the valve at full lift. I would guarantee that the shaft needs to move over .100" for your combo. Or, you could put a solid roller in it, with a bunch of valve spring, and flog it on a dyno. It will rev just fine......for a while.