Likely any engine from a junk yard did not include the supercharger or the engine cover. So you can not judge by that. A series 3 supercharger (L32) would not let you bolt your throttle body up with out a $100 adapter ordered from a performance shop and he would have had to put your old fuel Rails back on.

That being said there is no easy quick way to tell what was put in. He most likely bolted your old supercharger and fuel rails to what ever was delivered.

He had to get a supercharged motor (heads different than normally aspirated) but L32 motors are over $1000 for ones with 100,000 miles. Chances are it's a high mileage L67.