I looked into the Walbro, it is high on my list of options. That particular pump seems like it would be easier to mount than a standard vertical style pump. Which Aeromotive pump do you use? In tank or otherwise? In tank is usually a different style pump altogether and is generally submerged in liquid which I would think would help to dampen vibrations.
Frankly, the more I think about it, I really don't want to deal with installing an in-tank pump. The main problems I see with an in-tank pump in our cars are with the tank itself. A body gas tanks are a little snug in the front up against the trunk floor, was thinking it might be a PITA to run all the lines from there depending on where you mount the pump. You can cut out a section and make a lower mount for it but that's a lot of extra work. The tank is too shallow towards the back so you couldn't put it there. If it's in front and you had low fuel you risk uncovering the pickup on the hit. You'd need a baffle which I don't have in my factory tank. Guess that's why guys use aftermarket tanks in that situation, takes the headache out of it and they usually have baffles installed.
I need to get under the car and look at it. Maybe if I stare at it long enough I'll come up with a solution. :D