Just for perusal;
Several guys on FABO, myself included are running, or have run, near or at 200psi with aluminum heads.
I have never run anything but 87E10 at 930ft elevation, and a minimum cooling system temperature of 205*F. My engine was built in year 1999, and has over 100,000 miles on it. The Scr has been as high as 11.3 with a 292/292/108 Mopar cam. and as low as 10.7 with a 223*.050 Hughes cam. Currently running 10.95 with a Hughes 230* cam. I run a A833 and 3.55s at 3650 pounds. Goes like a scalded leopard.
