Finally got the IROC bumper model completed in Fusion 360. Accurate to about +/- 1mm. Was a major pain in the ass because of all those compound curves.
Modeled this with a combination of manual scanning the measurements, and importing a bunch of photographs.
Now that I've got this, I can start designing the bumper impact bar, and the radiator mounts.
Here's a link to the online version of the model so you can play with it.
https://a360.co/2HGm93Q