Ok, I took the turd to a local shop, and I'm totally happy with the pipes they bent up for the back half, but not so much on the placement of the glasspacks. They need to come forward. I feel it's my fault because I saw it in mid process and didn't catch it then. Ah, the joys of being a perfectionist, ill -equipped to the task. I'll get the shop to give up some pieces of tubing bent at 45 deg angle, and re work it.

I promised an honest SOP evaluation, and my first impression was, OMG, I crippled it! But with the open pipes, I couldn't hear what was really up- once the mufflers were on, I could clearly hear and feel the engine wasn't hitting all eight. On a hunch, I checked #6&8, sure enough, t they got swapped.
With the wires straight, a quick test drive showed that the seat of pants, honest evaluation says that the flow isn't as good, but the performance loss is negligible. Sounds good, and a lot quieter.