Jim is correct, and I too remember a big pile at Murrays Moms house in the early 70's - should have bought an oil pan but we all scorned it as being too low...................
I also bought my original Ballenger LAT headers from Murray
I have MRC valve covers on both my cars, and easy to tell as "original" due to the wide flange.
Which begs the question as to what is original? Is the SS ones anymore or less original than the MRC ones, as all come from the same Shelby Enterprises mould
BTW, Nyes Foundry in Vancouver did the casting work, and changed the Buddy Bar Dymo tape label to the MRC one Jim shows - Rick/Buddy Bar would have changed it back