I have a 93 GT with aftermarket heads, intake, e-cam, 65mm T Body, 75mm Mass Air, 24lbs injectors, full exhaust and some other small stuff. Do you think it would be safe to run turbo blue racing fuel it is rated at 114 octane?
Don't bother. From the mods you have listed above you don't have enough compression and probably aren't running enough timing to need it. Yeah sure it'll run on but it'll probably slow down on ya. I run my R headed 408 on 116 octane but it has 13:1 compression.
Don't waist your money. You don't need it. The higher the octane the less volatile the fuel is, which is great with lots of compression or boost because it's more of a controlled burn and resists premature ignition or detonation. But the lower octane is more volatile and should make more power. Ideally you want to run as low of octane as you can without detonating.