American Motors: pushrod removal, rocker arm, rocker arms

Question
i have an inline 6 258 4.2 liter, i need to clean pushrods, how exactly do i remove them

Answer
1) Remove valve cover
2) 1974 & later: Remove rocker arm bridges by loosening each bolt a little at a time so the bridges do not break.
Pre-1974: Loosen the rocker arm nut enough to rotate rocker arms.
3) remove pushrods.
4) re-install in the reverse order.