Highly recommend, turning the valve guides down,before installing the springs. You're limited to about .520-ish lift,on a 1.6 rocker. Running a LA "retro roller" cam based on a LA 1.5 lobe lift, leads to high lift numbers.Would still recommend a push rod length check,the stockers are usually too short,on a reduced base circle aftermarket grind. Magnum swap,com,has a listing of a affordable Comp Cams push rod set(30-40 bucks).Hope this helps.