I'm gonna guess.....that looks like a mark from a nut without a washer power torqued down. Perhaps somebody tightens that corner down in a jig of some sort on the line and runs a grinder along all the surfaces to remove slag. Maybe its a machine and it's all cnc controlled. Sucks for you though. Get a clean used one. I recently sold a.sb holley strip dominator and regret it but there are great intakes out there for less than 500 bucks. Good luck.Lets see if Edelbrock actually gets back to you.
