So here is how it began.
Just a typical, mint Sierra that I got off of Ebay (Originally unopened) thanks to a gift card since I have only ever seen one in the wild. (And that's the only other one I own sadly)
The casting was remarkably easy to take apart. The drill bit I typically use is too small for most of my customs, but since this former Corgi has smaller rivits than traditional Hot Wheels, it was actually the perfect size! Like, if you needed to train a beginner how to take apart a Hot Wheels casting, this is a good place to start if you can find one.
First thing I went towards was the wheels. I bought this Honda Civic Boulevard back when it was new and I had been keeping it tucked away, unopened for this project ever since. I have had my mind on these wheels for this casting for years, too long for me to change my mind so that was exactly what I chose.
Here it is in stock form with them:
Since I had a long time to plan this, I did some measurements years ago to see if the wheels and axles would fit on the Sierra since the casting was a little big and surely enough, it was perfect!