My first post here @ TDP!

Bought a 89 Chevy truck with a 6.2 for the engine and parts.
The plan is to put it into my 89 Chevy G30 4X4 van w/TH400HD.
I have a GearVender over/under auxiliary trans. in it already.
This should work out pretty well.

The valve cover sticker says 'Goodwrench 6.2', I assume it's a replacement or crate type motor.
Runs really well. (Needs new glow plugs as it starts hard).

Question:
Is there an easy way to identify what I have exactly?

I found info. on the web, but, I can't see behind the left head so I'm wondering if there is another option.

I look forward to my experience here.

Thanks in advance.

-Allen