Rear crossover pipe????

I posted this question on another forum and haven't gotten any responses.

Hi. I'm building a turbo 340 Duster. I've been looking at the pics of builds on the forum. My goal is to keep the alternator and power steering in the stock locations. I want to run the crossover pipe under the transmission with the left feeding the right. I want to weld the turbo flange to the right side manifold, then plumb the intercooler tubing forward. My theory is that is should work just fine. Its not how most people on this site are doing it. Most are running the crossover in front of the engine.

Who has done this? What are the cons?

Jessie Buhr