T3 flange on TE04H?

Instead of ruining my beautiful chrome turbo manifold, couldn’t I just cut the flange off of my turbo and weld a T3 flange onto it to work with my manifold? The only TE04H flange I have is the one off of the stock exhaust manifold and I have no idea if it can be cut, cast iron that is. I’ll try to post some pics but some advice would help.

You could just have someone make you an adapter plate, and bolt it between the two, but I heard that those tend to leak. But it’s still an option. These guys make them. www.homemadeturbo.com