Todd,
I ran just an EZ for a couple of years with no problems at all. I had purchased some 275's at the same time as the EZ, but did not install them. When I was ready to do the DTT transmission mods, I installed the 275 injectors and a larger turbo, also a Volant fresh air intake system. The stock transmission ( 47re ) started showing signs of problems within 60 days. With NO towing at all. I do not think the transmission would live with even larger injectors.
Foy