Here is the front motor mount on Paul's 37 frame, it is a new vtwin mount which is a forging and tough as nails. The dimensions are all corect, but the aesthetics are off. Sometimes you run into an issue like this, where you have a nice reproduction part that is functional but needs a few features tweaked to make it look more like the original. In this pic, the mount has already been welded to the frame with steel filler rod, the first pass of sillicone bronze rod is already on, and I have to make a few more so that there is something for Jesse to file off.
This is a similar problem, This frame is for Doug's 39, some chopper momo ground these lips off of the casting.
Here is a pic of the filler on top
And here it is after Jesse filed it down.
This is the rear fender mount, you can see that the horn button looking joint cups got sanded down, this was definitely done to make somebody's bike more custom back in the day