I know people think UCLA is probably the hardest game but I think Nebraska will be the toughest followed by either Boise or UCLA. I definitely don't believe Michigan beats BYU 8 out of 10 if Taysom is healthy.

Last year BYU and UCLA played 4 common opponents:
UCLA went 4-0, BYU went 3-1 (and if BYU stops Memphis on that last 4th down or they miss the 55 yard FG in OT, BYU wins that game)

UCLA beat UVA by 8 on the road
BYU beat UVA by 8 at home

UCLA beat Memphis at home by 7
BYU lost to Memphis by 7 in 2OT at a nuetral site in Florida

UCLA beat Texas by 3 at a nuetral site in Arlington
BYU beat Texas on the road by 34

UCLA beat Cal by 2 on the road
BYU beat Cal by 7 on the road

Moreover, Taysom missed 2 of those games. I'd say BYU has a decent shot at the Bruins in LA.