Curious what L series or series engine is this?

[Kennyvaldez1398]

I not to sure what engine this is exactly, just need help identifying so I can get the proper parts and specs 

[datzenmike]

That's a '75 or newer 620 so it came with an L20B. 

 

Lock at the top of the block where it meets the head behind the oil dip stick. There's a flat boss with the engine size stamped on it.

 

[banzai510(hainz)]

engine looks pretty clean(stock)

[DanielC]

Look at the top of the cam chain cover, just below the cylinder head.  In the bottom right of this picture see the two bolt heads about a inch apart, below and right of the smaller bolt with a wire.  If it has the two bolts in this location, it is a L-20-B engine.  Only one bolt here, it is a L-16 or a L-18