But now you have the EXPERIENCE to see what we all talk about all the time about Chrysler engines is true. The blueprinted spec on compression was always lower than advertised. Usually, by a good bit. I remember the very FIRST one I blueprinted. It was a 70 340. I kept measuring over and over because I just KNEW I was gettin it wrong. So I called an older friend who worked at his family's machine shop and he came over and measured with me (I was 17) and he verified I was right and told me then none of the manufacturers engines ever measured up to spec and that most times, Chrysler was the worst out of them. But honestly, at a TRUE 8.4:1 and with the right camshaft, that engine should be pretty snappy.