best headers for 69 dart?
thats an excelent way of getting a lighter wallet,but except for that it wont add much performance.
I think if you do some home work you'll see the difference
in good prepped manifolds and headers on a street motor is negligible unless of course you need every single iota of power.
All the extra troubles like burned wires, plug/starter access, rejetting,
blown gaskets, extra heat , not to mention buying a
mini starter and new pipes, yea headers can be a real bargain sometimes.
I'd bet if he had the distributor reworked and the carb jetted
properly, he'd find more power than he had to start with.
I'd say he'd be happier after buying some dyno time at a good tuning shop and a hell of a lot cheaper.
If memory serves, The Flying Green Brick used well prepped
340 manifolds at 450 hp.