The caps are torqued and align bored at factory then the thrust surface of number four is fly-cut in place. Any time a cap is replaced the main line has to be rebored. Putting the cap in the wrong position is a major screw up. I still can't fathom how the thrust bearing would have been installed in the wrong cap or how anyone would expect the engine to live. I don't want to spread doom and gloom but I think if the machine shop assembled the engine I would disassemble and reassemble it measuring everything along the way. If they just did the machining and did not assemble the engine measure everything twice. If you don't have the tools to measure the block and internal parts you may be able to rent them or maybe a FGF member in your area could help out.
