Here are some oil pump clearance photos. Stock 250 parts. I also decided to add some more clearance between the fuel pump lobe and connecting rod. 4.062 stroke, trimmed corner on rod, and reduced lobe diameter (.100 inch if I recall) gives about .030 inch clearance. When I swap cams I'm going to have to alter the fuel pump lobe again or use a 292 cam and electric pump.
