I do think this looks pretty neat... having just fabbed 2 x SS 3" tailpipes from a pair of SW turbo mufflers to exit at the stock location, it would be challenging but possible, keeping it tight, with a single 3" pipe to thread the gap between the rear spring hanger and the spring itself (with Deavers, same problem, but a bit easier with factory leafs and factory lift block)... but with the dove tail half of the area you photoshopped is gone... since the owner is dovetailing the rear quarters, I assume he is moving the spare... it that case fabbing tailpipes gets much easier, trual dual or otherwise... I do think the challenge will still be navigating the rear spring hanger and the leaf spring itself in order to exit out under the dove tail... I think you will come out with the tailpipe sitting lower than you would want...