Here's a third option to think about.
That engine can be worth a lot to the person who owns the 65 Vette that engine came out of.
Somewhere somebody could be wondering what ever happened to his original engine.
I don't know what state you live in as far as disclosure is concerned, but you might want to try and do some detective work. You might be able to find the owner by doing an online VIN search.
I own a couple of Vettes, and have been a Vette owner for many many years. I know how looney some guys can get about originality!
The owner of that 65 might give his left nut, first born, and even his wife in exchange for your engine. The value of the car can differ greatly between having the original engine and not.
For your info, the VIN for that Vette would be either:
Coupe - 194375S117687 or
Convertible - 194675S117687
Wouldn't that be a pisser if you contacted the owner and said "guess what"?

 

I live in NJ, you have any idea how to do a vin check?

 

Found this, Looks like the intake is Camaro, Block is Corvette (need to check the heads, someone mentioned mine have bolt holes and stock would be camel hump w/ no holes)

Intake Casting#
3905393 67 327-275HP, Pass, Chevelle, ChevyII, Camaro, CI, 4MV

Exhaust Manifold#
GM 38409Y2A RH (I think)

Carb#
7027202
Brand Type Number Disc
Rochester R-4 7027202 67 chevy 327-350

4MV=Carter or Rochester made spreadbore,
CI=Cast Iron,

 

Here are a couple of VIN search sites, however they require a small fee.
www.govtdmvrecords.com
www.govdmvrecords.com
Keep in mind, for all you know the Vette could have been scrapped years ago. Or the engine could have been pulled back in the seventies or eighties when "matching numbers" wasn't as much of a consideration as it is now. So it's hard to say why your car ended up with it.
Pull the valve covers off and get the head casting numbers from them as well.