Racing gas in Roush motors

[csx4910]

Forgive my ignorance with this question but for those out there with a Roush (or other big block). I have been running 93 octane up until now in the cobra with adding octane booster. Lately have picked up a hesitation under accelation I couldn't figure out. I got down under a 1/4 (which by the way I now understand why people say not to trust the gauge under 1/2 since it is nowhere accurate). Instead of filling up with 93 decided to try 104 octane available at the pump at a couple location around town. I hadn't done this since the car was new. I cannot believe the difference in power and accelaration as well as the hesitation went away. It feels like another 50-75 horses!

My question is this, Are there any long term risks in running this all the time other than being pricey? My engine is a Roush 511 with Fuel injection with a 9.5:1 compression ratio I believe. I dont want to damage the engine but if I can afford to, running that gas makes it a lot more fun to drive
Ron

Sorry Moderators, posted in lounge by mistake. Can you please move to general board?
Thanks