Not sure about the printhead but you can definitely convert T3270 to sublimation printer. There's a third party refillable cartridge that you can buy if you want to convert it to sublimation ink.
When you convert a T3270 to sublimation printer you need sublimation ink, ink cartridges and icc profiles.
We have a T3270 and use Sawgrass sublimation ink. Here is why. With Sawgrass, the ink cartridge and the icc profile issues are nonexistent. The ink (SubliJet-E) comes in EPSON cartridges and they just work. Sawgrass gives you the PowerDriver with icc profiles included for free and it is good.
There are two issues with this ink however: 1.) Sawgrass no longer supports T series EPSON printers (but the ink is readily available). 2.) The ink can "eat up" the damper assembly of the printer within a year or two. The assembly costs $150 and it needs to be replaced. I did it in 30 minutes after using the printer daily for more than 18 months. That is the extra "price" you have to pay for a cheap wide format EPSON sublimation printer.
Of course there are other ways to convert a T3270 into sublimation printer. You can buy refillable cartridges (and hoping that the chip in it will be recognized by the printer), you can buy better, less expensive inks (like EcoEdge from Digitally Driven) and you can create your own icc profiles.
In my opinion, this would give you better results, cheaper inks, and a more reliable printer. I didn't choose this route because I am lazy. Buying the Sawgrass ink and forgetting all the other issues, and spending $150 and 30 minutes for replacing the damper assembly once in 18 months is a pretty good deal for me.
Having a 24" sublimation printer with a built in cutter is heaven comparing it to desktop printers. I can send a project of 50-100 images to the printer and simply forget it. After an hour or so, I go back, and the images are ready...