heres my combo , i need more.....help

Tim;

It's an approxamation of 1 point of compresion. Thats why the Edel. heads come with a reduced chamber while the stock 340-360 heads are very open and large.
Edel. did the work for you so theres no compresion problems or performance loss. In a striaght out swap, you'll gain in performance due to the better head port and flow. Add hi-comp. pistons for a great quench area and your really starting to kick it up a notch. Also opening great performance doors of whats possible, or next!