You may have a valve sticking,I did on my 216.You may be able to straighten the push rod,just lay it on a block of wood and tap it with a hammer till it's straight.
To take it out just loosen the adjuster and slide the rocker sideways.
_____________
Floyd
If we choose being kind over being right,we will
be right every time.
Knowledge is a poor substitute for experience.
Remember what is precious to another, may not be to you, but it
is precious nonetheless.
1948 Chevy 2-Ton 
