Hi Justin,
Unfortunately editing the stock QuickBooks syncing fields is not possible. We maintain these field lengths to mirror the QuickBooks functionality, so even if you were able to change the field length - the data wouldnt be accepted by the QuickBooks SDK (the data would be stuck in Method forever!)
-Ben
Ben Hargreaves
Senior Support Specialist
Method:CRM
b.hargreaves@method.me
Toll Free: 1.888.925.6238
Local & Overseas: 416.847.0400
Fax: 416.640.6027