Regardless of fuel system on a 13-14 GT500 to run E-85 you need a Competiton Dual BAP and ID 1000 injectors at a minimum with the OEM fuel system.
Sorry Van, I was addressing the OP question of running E85 on a stock GT500.
I was under the impression just a boost a pump and tune and ditching the cats could tolerate E85 at stock power levels.
For those considering it, here's a quote from the KB article:
"E85
Here too, the 2.3 is too small to take advantage of the HP potential of the increasingly popular E85 which will support another 12 psi
(+240HP) of boost. Unfortunately, the 2.3 size and efficiency limits it’s boost/cfm capacity. Also, the 2.3 PC (power consumption)
and charge temp are increasing exponentially with boost and supercharger RPM. We have made 1000+HP on our Dynojet on
E85/larger injectors with ONLY an off the shelf 4.2 kit and a 20V BOOST-A-PUMP®. No headers, cat back, cams, heads, NOS, etc. "
http://kennebell.net/KBWebsite/Common/pdfs/Shelby_2013_TechTips.pdf
There are a few compromises, but if you can get consistent E85 at a pump near you (luckily I can), it truly is like getting race gas at the pump.
-J