No, I think you missed the word "not" in my post.
In fact, my oldest son has 11:1 with aluminum heads in his valiant. I just helped his brother build a 10.7:1 iron head motor. Its going in his 1/2 ton, which is heavier than the valiant.He is also using a cam with 10 degrees at .050 less than his brother in the valiant.
If I believed the aluminum/ iron controversy, I would kept the truck motor at 9:1. My personal daily driver, and only family car for years was a j headed 360 with a little over 10.5:1. Drove it daily all year round and the only time it detonated was a load of bad gas.
If you re-read my post, I said iron is Not the enemy of compression.
