hello superstreeter-you and i have a common desire---->to fully understand what big cubic inch chevys like!!!ive heard the larger the size of motor the more sensitive it becomes with compression because a 350 chevy with 11:1 compression has LESS CYLINDER PRESSURE than a 588 with 11:1 compression hence making the 588 more prone for detonation on 93 octane with aluminum heads.camshaft profile(overlap),rod to stroke ratio,incoming air temp,rpm of motor and many other factors dictate what a motor(especially big ones)will run on for compression ratio.so thats why i built my 572 at 10.2:1 compression.my pistons are .005 in the hole(thats what my motor builder said they shoot for-for safety margins) with an off the shelf je flattop piston with the 3cc intake cut out and my dart 355s are milled down to im thinking i remember 110 or 112 cc's.best bet is lay it out on the phone with piston manufacturer of your choice and order a flattop with 3cc intake cutout and mill your block and head(or just head if your motor is all together)to be between 10-10.8:1 compression if you like to be conservative like me---my 2 cents..................by the way i was wondering if you can contact me somehow i dont know how to use this site very well so if you can contact me id appreciate it(curious about your cams personallity!!!!!)