Modifying cast aluminum intake

[Ziegelsteinfaust]

I have LT1 350 in my Camaro, and have thought about using other ones for future projects. But I would like it to either be a tunnel ram or a high rise single plane.

I have the factory LT1 intake, and had the thought of. What if I cut away the top portion, and weld a high runner portion I need from another manifold.

This way I can avoid drilling my intake manifold to match, and running 2 sets of gaskets to seal her up. Plus the $2500 dollar custom sheet manifold cost.

Has anyone tried such a endeavor or welded that much cast aluminum together?