11:1 too high for pump gas?

I have been in that boat many times before. I will NEVER go over 10 to 1 on a street engine again. You'll never feel the extra compression in a street car other then always adjusting the timing and carb. Sure you have aluminum heads but when it is 85 of 90 outside and the sun it shinning down (when you will be driving it the most) it will be pinging away. Then the move the timing around game begins. I was at 11.5 to 1 with my 440 with aluminum heads in my Cuda. I just rebuilt the engine in the fall and it is now at @ 9.5 to 1 and it is so much better. Same camshaft everything, just refreshed it and changed the pistons. From the sounds of it you have plenty of motor. I would stay below 11 to 1 for sure, and trust me pump gas it a hell of a lot cheaper and you're not building something for fuel mileage :)