I've built 2 CR's from scratch. The sidepipes from
Shelby Cobra Kit Cars : [Ultimate Classic Cars] mostly resemble the CR. You are going to have to build your own headers or have someone built them....but it is very expensive. I will measure the radiator I went with. You can shop for Ebay if you know your dimensions and inlet/outlet configuration. Got to take measurements on engine placement for the air cleaner and make sure the distributor doesn't hit under the hood. Good luck. CR's are GREAT cars but sucks if you don't have all the parts.