Headers?
Did I mention that it is still a 5,000 lb Formal?
All of my performance cars that I had in the 70's had headers. What a pain in the *** when you use the car as a daily driver! Collector gaskets continuously burning out, manifold gaskets burning out, header bolts always coming loose, burning up plug wires. But the worst part especially driving on the street and there is no way to avoid it....sooner or later you are going to bottom out the headers! Flattened headers are worthless!
What is the gain from headers on a street engine?
Minimal......at best.