5.3 conversion

[pocketpool]

I am building a 68 chevy with a 5.3 out of an 04 pickup and when I set the motor in the frame I discovered that the exhaust manifolds are going to hit the frame rails. I have already powder coated the frame so notching the frame for clearance is out of the question. What are you guys who have done this conversion doing for exhaust? I am running the early classic motor mounts just in case that is going to make a difference. Any help would be great. Thanx