Driver Side TTI not wanting to fit...

Take out the torsioin bar it is so much easier sorry I miss understood your ?
nNO, The header is not supposed to hit anything thats why you pay the money depending on how much it is hitting the oil pan you might just need to send them back or you can also bend it away from the oil pan (once again I said depending on how much it is hittting the pan,bend at your own risk,but I have done this before,and it does work do it right and you wont bend the flange)