I post what I replied on FB here as well..
Much like in the automotive retail world.. 1977 is a pre-dominantly DROP SHIPPING COMPANY.
What that means is that the 'drop-ship' company will show what their 'distributor' (Atlanta Warehouse) has in stock as their own inventory.
When the drop-ship company gets an order, it processes your payment and marks your transaction. The company then cuts a Purchase Order (PO) out to the distributor to 'buy and blind ship' the order. Blind shipping means that the distributor puts the drop-ship company's logo/address/invoice/whatever on/in the package and the order looks like comes from the drop-ship company.
What happens when you don't get your order that you order from the drop-ship company?
If the drop-ship company is not updating their 'inventory' according to what the distributor has in/out of stock or backorder.
That means they sold something that no-one has on hand.. so there was never a part to sell in the first place.
While non-existent stock COULD be the reason why you didn't get your part.. the distributor will usually tell the drop-ship company that there is no stock or low stock.. and it is the duty of the drop-ship company to notify you.
Chances are.. the drop ship company hasn't paid the distributor or has been cutting POs without paying off their previous balance. The distributor then holds onto their own inventory and will only ship when there are payment arrangements made. Of course you only get a certain amount of leeway until the distributor will not ship anything for you anymore bc you're a liability.
This is more than likely the reason why you aren't going to get your parts from 77.. bc they haven't paid their distributor.