I need to adjust my lifters and this info is confusing. I have hydraulic lifters and mild lift cam in my rebuilt 273 with the stock adjustable rocker arms. Do I go by firing order and adjust both intake and exhaust valves - firing - or, use this Mopar chart which is quite different? What is this Mopar chart used for? High performance cams? I need to go ahead and adjust mine. What should I do ??