Sorry I never updated this to anyone that was following, and thanks to those that helped me with suggestions along the way. Here's a few videos and pictures of the finished system. I got this all put together in April, I just didn't have time to upload anything about it until now. Here's a few pictures of the exhaust.
I didn't have any decent videos of the exhaust on my phone, so I went out and took a couple last night. They aren't the best, but they'll have to do for now.
The first on is from idle to about 6k rpm in first through third from inside the car. (You'll have to click on them to play them.)
The second one is sitting in the car with the door open revving.
The last one I placed the phone right behind the exit of the muffler on the ground and revved to about 6k again, and then to like 3.5k the second time. At the beginning of the video you can hear it at idle too.
It's not loud at all at idle, sounds basically stock. When revving it has a little more sound than stock, but not a whole lot, which is exactly what I wanted. It's a FlowMaster Hushpower II #12412400 as a resonator, Magnaflow single in/dual out #12251, and the tips are Magnaflow #35131. Everything is 2.25". I think it came out pretty good, especially considering I pieced everything together based off of hours of reading and watching videos of Supras and other cars with the same mufflers.
The guy who welded everything together wasn't too thrilled when I brought him a box of parts, but when I came to pick it up he said I did a great job selecting everything and it all fit in perfectly. I guess he has had issues with people just bringing him stuff assuming it will fit on their cars... It sounds so much better than the 27 year old rusting stuff that was in there. I was amazed it wasn't loud before with all the holes that were rusted through the top of the mufflers. I took the OEM parts home with me and it was like carrying two maracas they were so full of rust haha.
Thanks again for the help, and sorry it took so long. If anyone has any questions or whatever feel free to ask!