Boomer, it's not a question of who agrees or not. You're new here. Copyright infringement is nothing ANYONE here takes lightly.
There's right.... and then there's wrong. There's no grey area. Your design is quickly recognizable and I'd imagine in the automotive trade, there will be many more that see that similarity. If you want to do your OWN dad this kind of injustice, that's up to you. He'll be the one ridiculed, not you.
What's a little odd is, if you're in the middle of some copyright problems, why would you attempt such a stunt ??
Again, regardless of how hard it is to enforce something.... that doesn't make it any more legitimate. It's not a question of getting caught, but having the reputation for being a copycat..... or a creep.