Starting a BB Duster project

What I learned is that you have to order the Stant part number. The super Stant is the premium brand. Part number is 45478 for the 180 degree. It is about $8 from Summit. Edelbrock sells the same part but they mark it up to $18. Summit sells the econo version as do several other vendors. I ordered a few different thermostats and they were all Stants but most were the econo version just marked up in price. The econo version looks cheap when you compare it side by side with the premium one. For $8, I don't see any reason to pay more or less. I'm returning all of the ripoff parts. I don't see any reason to give Edelbrock $10 for no value add.