i have a 89 power ram 50 with 2.6 g45b motor 4wd... cant seem to find anything for g45b just g54b i am currently haveing problems with valve noise to the rear of the valve cover so i might be looking for a new head or valvetrain parts and need to know the interchangeablily to g54b... and i havent taken off valve cover yet but i think its a hydraulic with jet valve system???? id prefer mechanical so i can adjust the valves myself any ideas?