It's really unfortunate they didn't market the Holden cars in America more, especially since the Caprice is an American car since 1965. There is plenty of interest in them if you do a simple search, you will see the number of articles and forums about the various Holden models. Chevy really screwed Holden by not properly marketing their cars when they decided to badge and import them. The dealerships didn't even know what the SS was when I was looking to buy mine and I couldn't find one at a dealership. They basically didn't market them at all. The one dealer thought I meant Camaro SS and then another asked me if I meant a Malibu...
I would love to see your final model when it's done, this is by far my favorite police car RIP. I really wish to find one with the Federal Valor light bar with the blue over the driver and red over the passenger like it is in my state.