Early 426 Race Hemi Crossram Manifolds

[Jerry@CHP]

Does anyone have any knowledge on the early race Hemi crossram intake manifolds? We just repaired and restored one that the owner was going to leave for dead but we saved it and brought it back to life. No welds visible at all when we were done! My question is this: some of these were actually magnesium and others were aluminum during this period. I am trying to find out what years were magnesium and what years were aluminum. The one that we saved was magnesium. 1964 and 1965 vintage.......I think. Any help appreciated. Before and after photos here to review.

We just received another one for repair and it's identical except for the fact that it's aluminum.

Thanks,

Jerry