With the 75% kit you will get a Goblin that is ready for you to install your own tires/wheels and seats to start driving. If you'd like to have body panels and lights, you'll have to order them and they will be shipped with your 75% kit. You'll install the body panels and lights.
I don't think they offer partial builds any more. It's too much of a logistical nightmare to ship parts like engines so they stopped doing it. I think it's also taken down as an option from the website.
I'm almost certain that DF doesn't offer partially built kits anymore. They found it wasn't very cost effective and was a logistical nightmare with the shippers. The partial builds used to be on their website but have since been taken down.