340 MANIFOLD VS MAGNUM MANIFOLD ?

I was looking to do the same thing with the 360 EQ heads and the repro exhaust manifolds. Has anyone else experienced this problem and would the edelbrock heads be the better way to go eliminating this port mismatch? Maybe the Indy MA-X heads, but looking at their picture might be the same problem.

The Edelbrock LA heads will not accept the 68 to 70 Hi Po exhaust manifolds but I have not tried their Magnum head with the manifolds.