Looks like the ship has sailed on this thread already but i will add my thoughts on pump gas and high compression.
The people that say you cant run 11 or 12:1 compression have probably never tried it. I have had two motors over 11:1 compression and only run pump gas with them. They both performed flawlessly and detonation was never a problem NA.
My old 345" motor was pretty tame in my opinion. 11.2:1 compression, TFS CNC 205's, box R intake, custom cam and a hydraulic roller. Shifted it around 6700-6800 rpms.
New motor is a little bit hairy, it is definitely on the edge of what some would call a street motor. 12:1, 240cc highports, .750+ lift cam, CHI intake, 7200-7500 rpm shift point that will probably go up this season.