Recommendations for good "A" street header

Soon (hopefully when the weather breaks in the spring) I will be shopping for a new set of headers for my A-body '72 340 Duster. The car has power brakes but manual steering, and a 4 speed for fitment. J-heads. Looking for recommendations on a decent set of street headers that will fit with no body modifications and won't break the bank, from you guys that have actually installed them and had a chance to evaluate the ease of installation and performance gains, as well as durability and quality. FWIW, the engine is out of the car (resto) so going in might be a little easier than some installs.
I don't mind spending a little extra if it's gonna actually buy me something.
Talk to me.