Yeah this game is awesome! I see the engine change option but I can't use it yet, I read somewhere you have to have like 1200 miles on your car before you can do it and you can swap basically any engine into it, V8, rotary, RB, etc. so we could make some damn nice Hybrid Z's on there, just need to find out how to unlock the 240Z, I checked gamefaqs, but they don't have a guide yet. I just unlocked the Ford GT, it is awesome but $$$. I started off with an S14 Silvia and now I have an R34, and it looks awesome, fully modded every part of the body clad in carbon fiber, and another cool part is you can plug your USB computer mouse in the USB port and use it in the "Dress Up" section to paint your car. My Skyline is black with red racing stripes and looks crazy.