JC Whitney used to sell a nice looking loch that bolted to the hood and a chain you attached to the radiator support or something. If anyone knows where they are still available, please let me know. I broke part of the lock.I have seen a few links of chain welded to the bottom of the hood, and a few links to the core support. Pad locked together. Since you did say you wanted to hood locked. This is a good way I think that you can obe day, if needed remove them, without any real negative effects on the car. Hood pins and such make if very hard to repair if you change your mind later.
The point of all this is to make it inconvenient to steal your car, not impossible. A hidden kill switch