I believe I was reading your thread the other day about your car. There are a lot of differing opinions on the Magnum heads but, from what I have read they flow pretty good for a cast head. They definitely flow better than the smog heads that were on it. When using them you either have to buy an intake drilled for Magnum heads or drill your current intake as the intake bolts go straight down like a Ford instead of at an angle like LA heads. You also have to measure for new pushrods as the rockers are pedalstal mounted and a different length is needed.
