So Party barge, I take it the car you built was abody style post smog and teh engine you unsed was a post smog engine. If that's not teh case, then you should have been able to regster the vechicle by the presmog part, car body or motor. Sb100 is the way to go to do that. people do it all the time.
Yep I have done no smog here has a new rousch 427r in itMaybe it's different. When I was looking into it. I was looking a building a Factory Five Cobra kit car. The process was to register it under SB100 as a 65 cobra, didnt matter the year of the motor. BAR would inspect it, title it as a 65 replica, and mark it no smog required.