CHEVROLET EL CAMINO CYLINDER HEAD VALVE

Hi, I Wonder, What Is The Intake And Exhaust Valve Arrangements In 4.1 250 6 Cyl For 77 Elcamino? Thank's, Elcami...

I Would Like To Know If It Is A Good Idea To Check And Adjust My Valve Clearance. My Valves Seem To Be Noisy, I Am Useing The Shell Gas 89...