I just picked up an original 1964 413 with 67,000 miles. It is listed as having 10.10-1 compression. If I switch to Fel-Pro permatorque head gaskets that are .020" thicker than the stock head gaskets, what will my compression ratio then be? Also, will this engine ping on super unleaded? It still has the stock, non-performance camshaft. Sean ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.