Glamour Shots.. '62 Valiant Wagon
Digging this build and the Trailer hitch, from a VW you said?
Yes,
Yes, Look
Here Starting on the post dated 4/11/22.
It gives a bit more information on how the hitch is mounted.
Curt #11000 is 39" wide, you need to cut ~1.5" from the tube on both sides and then resquare the plates in both planes and then reweld them.
I also cut off the "L" ears and made/welded them level for the application you need and then, they bolt into the frame rail with 1/2" grade 8 carriage bolts (hole drilling required.)
The hitch kit only comes with 2 carriage bolts and 2 serrated flange bolts (all grade 8) You will need 2 more of each. and 2 more of something like
these. The parts I linked are too long but you need a block of metal similar to the ones provided that will go into the frame and sandwich between the rail, the carriage bolt, and the hitch.
I found some that were made for 7/16" carriage bolts and I filed them out to 1/2" they have worked fine.
Happy towing! Check those brakes!