I'd go to another engineer for his perspective on it.
I can see why the front and rear reo being modified might cause him some concern - they are part of the vehicles crash performance and if they've been modified, then the crash performance characteristics of the car have been changed.
The reason he's picked up on your seatbelts is because he's putting his name to the vehicle being OK for use on the roads. If the seatbelts look questionable and fail, then it's his ass on the line for OK'ing the car having them in there. Worst case scenario grab a clean looking set from a car at Pick-A-Part.
I agree with Mike re the AWD vs FWD gearbox setup. I'd just leave the AWD one in there and tell him you've changed it to FWD. He won't know any different.
I can see why the front and rear reo being modified might cause him some concern - they are part of the vehicles crash performance and if they've been modified, then the crash performance characteristics of the car have been changed.
The reason he's picked up on your seatbelts is because he's putting his name to the vehicle being OK for use on the roads. If the seatbelts look questionable and fail, then it's his ass on the line for OK'ing the car having them in there. Worst case scenario grab a clean looking set from a car at Pick-A-Part.
I agree with Mike re the AWD vs FWD gearbox setup. I'd just leave the AWD one in there and tell him you've changed it to FWD. He won't know any different.