[mickmate]

It sounds like you are using a pickup at the bottom and the 90 fitting is available. I would plumb that up into the rear inner fender. You might also want to put a rollover/spill valve into the vent plumbing. Like Rick said it's just a little plumbing. You could try what you have and see if it even needs venting. It depends a lot on tank shape, angle, fittings location, cap venting etc. Think like the fuel!