I have been running an E-303 for a couple of years in my 5.0 Ranger ( about 10,000 miles ) I never did do anything else with the valve train. What is the stock rockers 1.6? and what is the advantege of changing them to 1.7? Should I shim the rockers sence they are not adjable? How should I have adjusted this cam after putting it in? I have been reading alot about diferant things and realy dont know what I should do. Thanks all for your help.
