604,
Just installed the TTI manifold-back kit on my 65 signet convertible a month ago. I cut the bracket off on the passenger side and reinstalled the cables after i was done with the exhaust. Parking brake works but i haven't tightened it enough. It's resting on the exhaust pipe too; no noticeable noise.
Some tips/comments:
1. Had major problems installing the rear hangers. I ended up modifying the ones they sent.
2. You'll also need to cut the main pipe down (after the y-pipe) to fit the mufflers properly. Believe they state that in the directions
3. Had to raise the motor on the passenger side to get the passenger side pipe installed.
4. Had almost no room to install the oil filter on the 90 deg adapter once the pipe was installed. The filter is very close to the frame rail. Next time i change the filter i'll cut the rail and reinforce to provide a little more room to thread the filter on.
5. I have major drone noise at cruise speed which is driving me nuts. My understanding is that it's a resonance in the exhaust system. There are various ways to tackle it but i haven't started that yet. Let me know how yours sounds once you get it running!
Good luck!