I have a receiver hitch on my 1940 Dodge. I'm many miles from it or I would send pictures.
It was built and installed by Spiller Custom Hitches, Austin, Tx for about $300 15 years ago. Works quite well.
Basically, there is a 1 1/4" reciever up under the bumper. It's back far enough and high enough that you can't normally see it. The ball mount (piece with the trailer hitch ball on it) goes out, then curves up, so that when installed the top of the ball is about flush with the top of the bumper.
there are 2 cross pieces below, going just below the tank and frame. Those have flat bars bent to fit (2 each side) to the outside of the frame. Pictures would help a lot.
Please note: Most collector insurance policies will not cover pulling trailers. Worse, you'll be cancelled. If they see the hitch in the photos you send, most won't write the policy.
When I talked to Hagerty about this, I told them I'd read my policy and it mentioned nothing about pulling trailers. They said that on the initial application one question was "will you pull a trailer". If you answered yes, they would not sell you insurance. If you answered no and ever did, it is fraud and your policy was "void from inception",
there are a few that will cover pulling a trailer. Ask before hand.