It seems to be accepted practice to spread closed face stems a little
to insert the bars. There is/was actually a special "stem pry" tool
made for the purpose. Jan Heine has a neat trick to accomplish the
same with bolt+nut+coin:
http://janheine.wordpress.com/2012/01/17/inserting-a-handlebar-into-a-stem/
Those Mary bars seem like a steal. I picked up an aluminum and a cr-mo
set to try. Be warned, the cr-mo finish is bead blasted and feels like
sharkskin--not exactly the "chrome finsih" advertised. Not that i'm
complaining for $20. Report back on how you like the Marys!
Best,
joe broach
portland, or