I used F body header on driver side . Had to cut steering shaft in half and added another joint and carrier bearing , still very close to . That's why I'm going turbo . forward facing manifolds .
You won't have any problem with GTs or Camaros . With my stock setup , I was able to keep up with 2010 GT500 convertible ( heavy car , even with 550 HP ) . Mine is a lot lighter now too . No HVAC , no bumper reinforcements .
Not pretty but it works . Joint angle is maxed .
BTW , I sold the 83 T5 for $500 and the turbo motor for $400 .