Exaust pushrods on G.M. 3.1 and 3.4 engines are longer than their intake counterparts.  It's critical to reinstall the correct length pushrod in the correct place.  So, how do you commit to memory which pushrod goes where?

It's easy if you remember this short phrase...  "It's been a long, exausting day."  This should help you remember that the long pushrods belong to the exaust valves.