If running iron heads he won't want 10.5:1 compression on the street. That is why I recommended 9ish:1 for pump gas. This allows him to have a safe combo that won't detonate with a bad tune. Most novice guys are just learning to tune with timing and carbs. That's why I gave him a good starting point for initial timing,full advance and when to bring it in. I just went thru all this with help from members here. I was only trying to help him get a fun combo without overwhelming him with crazy combos. I do see the validity of your thought process but this guy is starting out. Not building a pro stock engine. I have a buddy running a 340 car with a blower making 9lbs of boost on stock iron adjustable rockers. Makes plenty of power and rpm. Still running strong.