You are correct, if you can obtain a true 8.5:1. Moper's point is he's not likely going to get 8.5:1 unless things are checked and corrected to get 8.5:1. We all know the stock "10.5:1" 340's we more like 9.something:1 from the factory.
I understand his point. Thanks. But I am not talking about the compression he HAS. I am talking about a true 8.5:1. I never once said anything about what compression he has.
I understand completely how Chrysler engines are. They had higher than advertised deck heights, larger than advertised combustion chambers. Those rated at 8.5 were luck to be an actual 8.0. I realize that. I have blueprinted really more engines than I care to remember. lol I was merely saying an honest 8.5 engine is plenty capable in its own right, and I'm stickin with it.
There's simply no reason to build a STREET engine with compression that will push the limits of pump gas wen they will make respectable power with god parts choices.