Hey, with the conversion i'm doing its gonna be tough to get a pair of headers to fit. So til then i plan on using Ram Horns Exhaust Manifolds. Will these really choke my engine? ( 408 SBC)
from what i hear, they're the closest exhaust manifold to a Header. They're off a 66 Impala with a 283 in it....
Any Info on these Exhaust Manifolds will be useful...

,Thanks