Sure Pull Receiver Hitch?

[Kixwy2]

I have a line on a brand new receiver hitch that someone bought for a truck but never installed. I took a look at it today and it's in prefect condition - but I can't tell if it will work for my truck. The only info I was able to pull off of it was Sure Pull (Pro Truk series) with a part number of 37335.

It seems the company has gone out of business... Does anyone have any info on whether or not this would fit our year trucks? It was originally supposed to go on a mid 70's Chevy Truck, so I'm hopeful...