The best way of figuring out what's going on might be doing some measuring.
I could be wrong but some of frame components are symmetrical, such as bolts that go all the way through and you could do some measuring on your own.
Do some measurements and compare the results from left & right side. Such as:
rear axle to sub frame, vertical measurement.
rear axle to various engine mounts. horizontal measurement.
Best would be to pay a shop to take precise measurements
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That past my eyes thank you guys I was checking some measurements a few guys say to check with a simple method. Like from each side of the rear axel is measured exactly the same to the front axle in each side.....On an opinion since it rides fine and feels ok would it be worth buying a rear subframe. How is a good way to check what I call the basket( the mid frame with the vin).