[79C10]

Hey guys---
I just finished dropping a new crate 350 into my 79 C20 work truck. I slapped an Edelbrock RPM manifold and a 600 cfm 4 bbl on it , otherwise , it is stock . ( chrome valve covers and dress up stuff , but nothin that'll add HP )
I was thinking about leaving the stock exhaust manifolds and running dual exhaust , or possibly just putting on a flomaster on the single pipe...... or switching out to headers and dual flomasters .
What do you think will work best for torque and why?

thanks for your tips and advice , , and keep America smokin'!