Plus, if your going to go t3/t4, it puts the turbo in a bad spot. Trust me.
If you can get a hold of a Fmax or Protech mani, that's the way to go. Plenty of clearance. I went through that headache awhile back. I wound up modifying an equal-length rwd mani. Even though it's a bottom-mount, I have plenty of clearance for the radiator, fans, and alternator with a 3" downpipe.