new race car, no oil pressure

OIL pump is not flush with main cap. As was said before you have to us a bolt or machine down the oil pump bolt surface on your main cap, as well as shave stud on top and bottom and us a special low profile nut to get the clearance. you need.

If you did NOT do this, your oil pump is probably broke.

Simple test
temporally install you intermediate shaft and see if it gets stuck or binds.

If it does, you will be pulling your oil pan/pump to fix the problem.