I just found the TSB...

This is from LIGHT DUTY TRUCK SERVICE COMMUNICATION "CC-66-1-7"
and is a 292 specific issue:

Drill a hole through the drip rail to remove the Intake push rod.

Then, remove the intake grill and disconnect the wiper linkage and drill a hole up through the bottom of the plenum and a matching one at the top to get the Exhaust rod out.

Of course they expect that the engine was complete and suggest pulling the rods up to where they touch and marking for the holes, but probably not too hard to figure out with a stick or pencil.

Oh, and they also say to "Caulk the hole in the body drip rail and smooth it out for a neat appearance"



Good Luck!

Rick