I have a question about putting a 340 cam in a 318. From what I've found out, the 340 cam has a ivc point of 69* and this brings down the dcr to like 6.63:1 ( 18 psi lower cylinder pressure than a stock 318 cam ). Wouldn't this hurt performance rather than help? I based this on a 1973 318 with a 8.6:1 cr. Did I figure something wrong or have the wrong information?