Holley 4180 Junk Or Workable?

I bought a Holley 4180 for around 40 bucks thinking it was an early 60s carb. I looked at it and noticed there was a tag on the carb with a 1986 date code. I think I may have screwed myself out of 40 bucks as my research has indicated that standard Holley primary metering plate will not work, the throttle plate is different with the idle adjustment that is barely accessible due to it being an emissions carb.

So is it workable or would it be cheaper to get a standard vac. secondary carb?
Ya get what ya pay for!