Frost at top of door above door handle, gasket doesn't show damage
The only way for there to be frost at the top of the door would be caused by an air leak in the door seal or the door was not closed properly. You will want to verify the door seal making a good seal.
This is a 70s era frigidaire upright freezer that the door gasket is bad 30 3/4 x 53 1/2. Is there a replacement available?
Answer Hello Matt! The gasket listed for your model is part number ER5307512516. Unfortunately, this item has been discontinued with no further replacements or cross references available and our company is unaware of any other available sources. Sorry about that!
Is there an entire door assembly part number for this model as I've seen in other Frigidaire models? (FFTR1713LW)
There is not a complete door assembly for this unit. You would need to purchase each part individually.
Does the door have to be removed to replace the gasket and are the liner screws to be barely snug or tight.
The door does not have to be removed but you would want to loosen the screws when removing the gasket and installing new gasket. When tightening the screws they do not have to be real tight but a medium tightness.