Help car not craking with load

604GZ

trying to juggle work and the car is not easy sorry for the late reply guys! so just an update i swapped everything over from the old engine i set up the the turbos and everything made sure all the hardware and line are run correctly. i start my car and it runs, it is not running smooth as it should and it is very lean 16 on idle goes down when i throttle i ran for codes and get bank 1 is lean also the down pipe on the passenger side might not be fully sealed