Those Subarus are big with people swapping out the engine on VW Westfalias and their ilk for something with more oomph.
There are some very high-quality Porsche 356 replicas powered by turbocharged Subaru 2.5 Boxer engines. Here’s a guy in Knoxville, TN who makes one of the best, it’s converted to a mid-engine layout:
I know of a guy who races with SCCA here in northern CA in a Subaru-powered Porsche 914. I’ve even heard of people swapping Subie motors into Boxsters.