Probably now, but before last year the had to use the production chassis from firewall to firewall (i.e. the production car monocoque with tube frame subchassis to mount the suspension on) and the engine was a modified UZ series engine.
What's so absurd then? Especially from a marketing stand point

 

TOMS SC FTW!!!!!

damn all the SC took the top spots.



That would b the new nsx that is being released as a GT car only, no production car will made (or so they say)