I agree with Brett Mike you can trim them to fit almost any body, I now alot of guys are building their chassis from the ground up from styrene rod, and I plan on giving one a shot too before long, you can modify them to work and update them to look however you want.... here's a few of mine...
63 chevy 2 chassis..
69 camaro chassis..
I also use them with the resin pro mod bodies from flashpointe, I remove the firewall trans tunnel, and make the cage, and firewall from styrene..
69 pro mod camaro
my current project 68 camaro pro mod..
sorry for all the pics, but depending on how far you want to go, you can do almost anything with them. I love using them becuase If I was doing these without them, It would probably take so long that I would loose interest in it, and never get it finished...