My '84 pup has just had the top end rebuilt, head recast after blown gasket and cracked head, new valves, injectors rebuilt, the injector pump itself was rebuilt about 9000 mi ago, and a new fuel filter & housing, but it won't start. I'm assuming the pump's ok, having been rebuilt so recently, but there's very little pressure at the fuel line that connects to the injectors. I'm thinking it has to do with the fuel cutoff switch on the injector pump. My question is this, where can I get a new cutoff switch? I'd like to try that before I send out the pump to be rebuilt again.