Little help ID-ing this 340 wedge

I know I really should have grabbed the VIN but I was in a hurry and dropped by the car lot where I seen it, guy wants 15 grand which seems high considering dings/scrapes/deck lid being wonky. Has an oil leak too and the K-member has been welded/altered.

It's supposed to be a 1970 H code 340 wedge, but I noticed the stripe looks like a basic duster and the altering of the K-member with crude welds make me question it. I love the car and it doesn't bother me too much that it might not be an H code but it pays to know exactly what you're buying and it's value, it's easily done with a VIN which I'm grabbing tomorrow but I'm itching to know the truth... It looks like your basic duster re-badged and the motor swapped out to make it look like a 340 wedge. I'm not an expert so I could be making a fool of myself but didn't H code wedges have a stripe closer to the top saying 340 underneath it and basic dusters had a stripe more along the middle of the body? Anyways heres a pic



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