I have never liked headers, they produce so much more heat inside the vehicle but some think they are worth it... oh, they look cool but not for me..
I drive the car ever where not just a week-end warrior...lol
my 52 sedan does just fine without them, dual exhaust with early 60's manifold...
Engine & Drivetrain:
350ci engine from a 74 Chevy pickup (4-bolt mains)
Bored 0.030 mild porting
Warehouse Edelbrock Performer EPS aluminum intake
Holley 600 4-barrel HEI ignition
Muncie 4-speed
Numbers say it's an M20, but shift linkage would suggest an M21 Hydraulic clutch
Custom driveshaft from Drivetrain of Mesquite
70 Nova 10-bolt rear axle with 2.73 gears
Custom exhaust from Muffler King Smithy's glasspacks
pix of engine good luck with your choice,
you might consider also putting your question in the hi pro section