I'm not quite sure what "T-Bar" handlebars are. Could you possibly post a link or a photo to show us what you mean.
If I'm right you might be talking about 'ape hangers', or high handlebars?
You might want to explore using what old bikers called 'dog bones'. They attached the bars to the stem but raised them higher.
Here's a link to show you what they look like. http://www.ebay.com/itm/4-Alloy-Hand...#ht_2662wt_918