Suggestions for muscle car sound muffler without drone

Hi everyone, I know this is an old thread, but it seems to be the most comprehensive when it comes to constructing these resonators. The previous write ups are great, especially the part where the computer does the math for me. I'd really like to nail down a good method for fabricating these things and still have them look good. That being said, I have a few questions if anyone has any input.

• Does anyone have any more photos of the install locations, or suggestions on where to rout the resonator chamber after living with their setup for a bit?
• The chambers must be mounted after the muffler correct?
• I have read that they need to be mandril bent or the sound wave won't make the turn. Has that been everyone's experience? It looks like buck351's resonator is not mandril bent.
• Also, much of what I've read says that the bend should not be over 30 degrees and are ideally perpendicular to the flow of the main pipe, however the ones posted here appear to have 90 degree turns off the main pipe. Maybe this is only if the pipe is making a continuous bend?

I have a 67 318 with 920 heads in my 73 duster with 1.25 pipes and dynomax super turbos and an H-pipe cross over, but I've got an obnoxious low rpm drone.
Thanks for the input.