[urq] Tire size on 17" wheels

[JAM]

Long time lurker here.......thanks for the wealth of information.  I just bought a set of 17"x8" et 32 wheels and need to equip them with tires for use on the urq.  I'm toying with 215-40s or 215-45s but I'm open to other suggestions.  I would consider 225-40s but it looks like only a couple tires are available in that size.  Are 225-45s a viable size?  Care to hook a brother up with some knowledge?  
Thanks!
Jason 
'83 urq
'95.5 S6a
'05 Legacy GT wagon 5mt
'70 MGB