Hedman Shorty Headers?

my 67 has a 360 automatic. when i got the long tube header in and lowered the engine back into place the one tube rubbed the steering shaft. the directions said to mark where it hits, remove the header and hit it with a hammer enough to clear. i also have power steering. i don't know if there's a difference between 67 and 68 but this really did happen and it really did say that in the instructions. i'll see if i can locate them in my garage and scan them on a post.