There was a guy local to me a couple years ago with a 2nd gen RX that had a junkyard/swap meet 306 with a old detroit turbo and an air to water intercooler made from an old cooler with a c-4 trans...car weighed 3100 with him in it 6'4 about 250lbs and the car ran mid 6's in the 1/8th stock rear diff. I bet he had probably $4k in the whole car lol