1993 Civic CX hb.

My exhaust manifold was cracked in half, so I removed it for replacement.

While I was there I thought.. "Hmmm, lets get rid of this puny 8 valve cylinder head and throw on a 16 valve from a DX."

I pulled the CX cylinder head, but the intake side is different.

The holes are much smaller on the intake than the DX head.

Questions:
Since the holes are smaller intake side, can I bolt the intake on and go with that?

Should I do some home porting on the intake and match sizes? I can use the gasket as a template.

Is there another intake that will bolt on, and use the same harness? I can swap computer if need be.

thanks