You might be able to get the T2s on. Since they are a fatty-style bar, you need to use an aftermarket clamp, these typically raise the handle bars about and 3/4-1 inch. I ordered one for my T2s that raises it 20mm taller than stock.
Here are some pics of the IMS tank. It's only .8 gallons bigger than stock (4.0g vs 3.2g), but I know how every bit counts on a long trail! It doesn't look as high as some other IMS designs I've seen.