you can use man adjusters on a hydrolic head but you can not use hyd on a man head.hte valves are diferant lengths.the man adjusters can make up for the diferance but the hyd lifters can not.when i got my clearwater head i got man adjusters and i am happy with them.but i dont mind adjusting them every 10000 miles.plus they are not as noisy as the hydrolic stock ones so i am happy.

87 dodge power ram 50,35" tires,5 1/2" total lift,4.6 gears,lockers front and rear,Rancho RS5000's,custom front bumper,custom rock sliders,cct extended diff breathers,75 amp alt(40 amp stock),thorely header,K&N,wheeled hard...