Thats the dumbest shit ive ever heard. Do you have any idea what a 406 is? Thats an FE, thats what i know the most about, you dont even know what FE satnds for let alone how its different from other big blocks. Look at the comp ratios, 12.5:1 and you source is shit, they went to 13.0:1. Also, look at the years that motor was available. They still had a thing called lead in the pump gas, do you know what lead is? The 406 is a 427 with decreased bore, the 427 was banned by nascar because the only engine that could even match it was the Hemi, which was banned also. The 406 is rarer than a 427 side oiler, not that you know what that is either, and if you think Im lucky enough to own one than your dumber than I first thought. I build HD 390's because of the price difference. They start with 9.5:1 compression and 275HP. So, 400 horse is a big jump, considering the compression remained the same, as well as stroke, and the stock crank and rods where used. I suggest you pick you battles a little more careful next time you fuckin idiot.
P.S. I used the same source on those numbers that you did, incase you wanna argue more.