TTI 2.5" Exhaust system install....many problems

Well I started installing my 2.5" exhaust system on the 73 340 dart sport today. Ran into a few issues so far. Its a 340/727 and running the stock exhaust manifolds (73). The driver side manifold pipe fit beautifully. The passenger side fits great up until where it passes the trans and heads towards the crossmember. It looks like they didnt bend it far enough because the pipe is too low and is angled out in the direction of the rocker panel.
Second issue was the pipe hit the oil filter so I need to put on a 90° adapter. I kinda knew this ahead of time and have an adapter ready to go on.
Next problem is the muffler hangers are nowhere close to lining up to the seatbelt bolts like the instruction says. This seems to be a common problem as I saw many posts about it.
The last issue involves the exhaust tips. TTI moved the hanger location 5" back and if I use that the tips wont stick out past the bumper. If I use the stock location they wont slide on the pipe because it will be on a bend. Yep, gonna have to cut back before the bend and add a section of pipe.
This sucks to pay $700 for an exhaust system and still end up with a cobbled mess.