Funny guy...
But why not just splice it in the line like a inline fuel filter.

I have a nice aeroquip regulator, but it's too big to mount down by the pump. I used to have it on the inner fender, then back to the carbs.
My old holley reg., I had in the same place, come to think of it. Sometimes they are mounted right next to the carb, with that fancy bracket. I have never really seen them spliced in before. Maybe the weight is an issue to consider. Sagging and such.