So I was contacted by the guy on MR2OC who makes the V6 mount, as it appears that is the reason for this:

He offered to send me an unwelded mount, so I can get the measurements correct and have it welded, but I told him that would not be necessary.
It looks like I'll be taking it to my shop next Monday-ish to have the exhaust fabricated, brakes and clutch bled, fuel line extended, and the front mount plate replaced to bolt up. I'm not sure I want to twist the motor around to get that front mount to line up, but bring the side mounts to their flex limit in the process.
I'm wrapping up my portion of the swap on Friday when I put fluids in it and with any luck, fire it up. A video will be posted of that, and another when it returns from the shop with a functional exhaust system.
I also got a supplemental harness from MR220V the other day with resistors to clear the automatic transmission codes, as well as some other CEL junk. I still need to find a way to mount the V6 ECU in the trunk, as it is substantially larger than the 5S ECU, and the OEM brackets do not work. Minor details.