Your 235 would have come with the 2 bolt valve cover from the factory. The timing mark is a small bb, it is the size and shape of a bb. You should have a triangle, thats TDC shortly after that you will see the bb. I had to spray carb cleaner on the flywheel as I turned it over (easier w plugs out), finally rubbed the flywheel with a rag soaked in laquer thinner a bunch of times to find TDC. If it has hydralic lifters it must be a car motor.
