draw thru carb mods????

OK, so I read about draw thru turbo systems a while ago, I just finished reading Bakerlites thread on his draw thru 318(awesome BTW, can't wait to see it finished). Now I NEED to do this to my 440! My question right now is do I need to modify anything on my carb or fuel system for a draw thru set up? I am running a holley 4150 750 cfm duel feed double pump four corner adjustable( just bought it brand new last season) and electric fuel pump at 5 psi. I currently have a used turbo off a ford 7.3 diesel. The 440 is a low compression motor and what feels like a very mild cam. Its what was in the car when I bought it. I guess the other question I have is about the turbo, I read something about the seals in the turbo because it goes into a vacuum on decel. Is this a usable turbo? Are there seals that can be upgraded if need be? Also considering using 2 smaller turbos( hopefully can find something cheap) that way I don't have to run an exhaust cross over. Any tips and advice are greatly appreciated!!! Thanks! Jon.