74 dart project

Personally I would check it anyway if the shop took it out that board the motor he may not even know what you're talkin about.

Now if you're getting oil to the rods the oil pressure should still be up because it's being fed by the main galley but if your gauge is wrong then it could be the number two and number for cam bearings are not lined up correctly to oil your rocker arm assemblies but that would not affect your lifters pumping up.

I would check that plug on the driver side oil Galley and I would check that the oil pump is mounted flat on the rear main after I check to see that the plug is in it. And if you take the oil pressure sending unit out and stick a rod down the hole, it should go down approximately 7 and 1/4 in and stop if it goes beyond 7 and 1/2 in, that means that plug is not in there. And you have to remove the rear main cap in order to put one in it.