BTW: What is MFG?
Manufacturer
Here is my dilemma: buy a new Holley 3259-1 for $1100 or buy an original wrong date code 3259-1 for $1600...but get a NOS carb. What would you do between the two options?
Here is another way to look at it
Buy a new Holley for $1100
Buy an old new Holley for $1600
Looks like a place to save 30% to use somewhere else
Consider that what your buying with the second one is a service replacement that will be a used carb (just like the top one) as soon as you bolt it on the engine, you run fuel through it and it possibly/likely may leak due to the old seals drying out or reacting to the new corn fuels.