Whatever looks good sounds interesting... maybe right in the middle of the hood, that way the passenger can see it also
I think Vikki has a template on her site showing dimensions off the corner of the hood. I used one but I think it was for a 68 and realized before I started cutting too much. Used a hole saw to get the hump that sticks down centered in the traingual spot under the hood. Then needed to square out one end of the hole with a tin snips. Make sure to use a sharp new hole saw.