Hello.
Using Converter to re-size the partition should not create any problems for you. Just stating the obvious here, but I would recommend to stop the SQL services during the P2V.
Good Luck!
Brian Atkinson | vExpert | VMTN Moderator | Author of "VCP5-DCV VMware Certified Professional-Data Center Virtualization on vSphere 5.5 Study Guide: VCP-550" | @vmroyale | http://vmroyale.com