Let's Build a 416 with Cast Iron Heads and Manifolds

Brooks James said

92-3 ?? Dakota RT 360 Magnum
2 1/2 outlets very similar in flow to 68-71 340 manifolds

Click to expand...

I don't remember the exact ones, there was a mopar mag did a manifold shootout, I know the best combo was a mix of one 340 and one 5.9. second place was two magnums and third was 340 then 360 then 318 but there was only a like 5-7 hp from best to worst.

Here's another shootout but no magnum, 318 vs 340 was 4 hp on a 300 hp engine.

Installing Exhaust Headers Into 300hp Crate Engine - Mopar Muscle Magazine