Slight overreaction from a few people just for the sake of a bonnet vent.

I agree that it will look out of place, but have seen far worse things.

Think it could be modified to quite a nice "period" look with the rear louvre. Something different from the norm. I can't remember seeing something like that with wolfrace wheels/slot mags or something like that with some period street machine-esque mods in many year. That side of thing could look ok and different. Personally I'd be going a more conventional and "clean" route, but always nice to see something different as long as it's done well and tastefully. A bonnet is easily changed so hardly ruining the car.

I would urge caution and remember the value of the car, and what the value of the car could be if well preserved in years to come.....