SB EXT. MANIFOLDS QUESTION

toolmanmike said
A 408 really needs headers but 68-70 HP manifolds or the Magnums would work ok. They will take horsepower from the table though.

yea I know im hoping its just for the time being ill have to save up the money for headers. Can you give me some info on the magnums ? I know nothing about them. what years what trucks ect