Looks like we finally got this issue resolved. I got a set of the rubber gaskets and some spreader bars for the covers. Gunked the motor and pressure washed it to clean up the oil mess.
My shop took off the covers and the cork gasket was split on the pass. side which was the cause of the leak. He cleaned the covers, flattened the gasket surfaces and installed the new gaskets. [sealer on both sides]. Installed with the spreader bars and longer bolts...no more leaks.
One more cleaning tomorrow and we are good.
He always checks over the truck from front to back...rear differential fluid was all 'foamy'...turns out the metal fitting for the vent was plugged. He had to use a drill to remove the blockage and then re-install the hose and fresh oil. This is an old school shop, they specialize in transmissions, but the owners son is one of the best all around mechanics I have ever met.
This truck just celebrated is 40th birthday...long live the square bodies
