There must have been some mistake when you ordered this part.  I sell the
same collapsable push rod tubes that Ron does for $19 (same price) and I have
used them a few times.  They work great and there is no need to remove the
head.
Here is what it looks like:
Two tubes, one inside the other with an o-ring inside and a spring (to hold
tension after you install it).  One of these was a real life saver on my '84
Vanagon GL that had a pretty massive leak from a rusty tube.  Replaced it
with the collapsible version and it was as dry as a bone for the next year
until I sold it.
Ken Wilford
Van-Again
John 3:16