I saw these 510's at the Bayline event this weekend, and found, what I feel, is the two coolest swaps I've seen. I'm sure both of these cars are on here as well.
1.) A 510 with a massive turbo and 20b Three rotor.
2.) A 510 with a custom supercharger setup that I couldn't stop staring at. It made me miss my 82 GSL, and I've started looking for another one.
While these are not as chromed out, or rare as some of the engines in this thread as a rotary fan and a Datsun fan these are very much engine porn for me. If the owners are on here, thank you for keeping the magic triangles spinning.