Looks like the big loser here is the driver's side 340 manifold as when the ran the engine with two of those piss poor manifolds, it made 20 horsepower less than the same engine with two passenger side manifolds...
The Magnum manifolds weren't quite as good as the early 340 manifolds (one right, one left) but they didn't use the early Magnum manifolds which have bigger outlets. What's up with that????
Headers make 'em all look bad...
You pays your money and youi takes your cherce... :cheers:
