Garet---look at this pic, but dont pay any attention to the 2 filters. BUT the location of the pump on the floor cover. In that location, the pump DOES fit under the stock Vans cover.
NOW with the AeroLabs gascolator that you want to use, it makes its install VERY TIGHT, and you have to do it first. Mainly because of the inlet fitting to selector valve connection. That is the constraining factor.
Once the gascolator is set into position, and its connection to the valve is done, the pump placement and its connection to the gascolator can be fabricated.
2nd pic shows the stock cover. You 'may' have to change the forward side alittle to gain some clearance because of the pump location. I cant tell you that without kknow the exact location of the gascolator, and the pump. You actually 'could' open the front of the cover for the clearance. You wont see it anyway.
Sometimes, 1 off installs are a real PITA. It all depends on what you want to end up with.
Tom
Tom