I recently pulled the motor out of my stock 73 FJ40 that had been sitting in the desert for years. I have 20 miles on it in 6 years of ownership. I did a compression test, numbers were good, so I decided on a light overhaul; replace the outer main seals, gaskets, water pump, put a 2f Valve Cover on top as Mark has suggested. I have the VC lined up for tomorrow and pulled the stock cover tonight to get things cleaned up. To my dismay, it's filthy and rusty underneath. Pictures attached. What should I do at this point? The engine is on a stand, I had the oil pan off and the bottom of the engine looks good. There was a little bit of rust on one of the pushrods when I replaced the side plate gasket.