3.8 l ford still has some valve train noise. Replaced lifters with ford replacements and push rods. Have real oil pressure gauge never moves under 68lbs. pulled spark plug wires one at a time and reconnected. No lower end noise detected, Changed pedastools and rockers. Suspect side clearance issue with rocker arms they move side to side too much .2 inches. oil pours out of push rods on to rockers .Will recheck lash in spring. What could be the answer.