340 manifolds and Magnum heads

The magnum exhaust port exit is some higher I believe but I think by the drawings I have looked at all 4 ports are the same amount higher than LA ports but their shaped the same with the same amount of sealing surface area. This being the case I can't see why LA headers won't bolt up properly but it probably will raise the header by the amount the ports are higher. I know the LA ex. manifold gaskets I used on my Magnum heads were dead on. The only thing problem with raising the headers is room is limited in an A-body chassis as I'm sure your aware of. I understand your point that you don't want to buy something that may not work without a big modification. Wish I knew somebody that had a set of Magnum heads cause I have a couple sets of LA header gaskets I could compare them too.