best headers for 69 dart?

It's about 700+ to extrude hone a pair of exhaust manifolds IIRC.. No thank you.

I bet if they wanted the brick to run faster, they would have put headers on the 500 hp engine instead of the stockers that choked it to 450ish.

Every guy I know that runs FAST style would rather run headers than stock manifolds from an ET/MPH standpoint. Takes a bunch of extra work to get the cars to run and headers would be faster.

Here's a real world comparison tti to an extrude hone set of 68-70hp's
---------------------------------------------------------------------------------------------------------------------------
I have a real world comparison between extrude honed stock manifolds and a set of TTI headers on my old 70 340 swinger.
The engine was the original 340 that was bored .030 over with a somewhat hot hyd cam from Hughes engines and an Edelbrock RPM intake and Holley 3310 carb, heads had Hughes stage 1 porting done to them. Had the original 727 trans with shift kit and 2800rpm stall converter and 355 gears. I had the stock manifolds connected to the TTI system from the headpipes back and the car ran a best of 13.46@101mph. I then installed a set of TTI stepped headers and with no other changes ran a 12.76@106 on its first run down the track. So is the extrude hone worth it, not in my opinion.

.7 and 5 mph.... yep worth every penny of the 700, not a fricken chance!

Pick your parts, pay your money