The oil cap on the valve cover has different threads I think(not sure) than the one on the gear housing. The one by the dr side engine mount uses an expanding rubber plug instead of threads. Which one are you looking for?
I'm in need of the starter spacer 4 a 4bt with the chevy adapter. Cummins part number 3906647. It's a 16mm thick spacer. Hit me up if you have one for sale.
Also, I'm looking for the stock intake tube for that motor. My motor didn't come with the starter or the intake tube.