There is nothing done to the car itself. It is still stock original and even has power windows. It is my brother Corey's car. He and brother Duane built the engine combo. I don't know all the details. Corey did post some of it on Facebook and some of the forums. It isn't really built for any particular class. It certainly isn't like one of the F.A.S.T. participants. That have all aftermarket engine blocks and heads. Cars that are lightened up with electronics and have fuel cells in the trunk. They are really, purpose-built race cars. The OLDS is probably more stock appearing. Especially since it has factory castings including the correct exhaust manifolds. I know it is a low compression engine with 9.2:1 CR. He can drive up to the pump fill it, drive it, and race it on pump gas. He wanted to be able to drive the car anywhere and anytime. And go cruising on Sundays. And not have to mess around with fuel. Going to try and do some more test and tuning. And once it's dialed in. Then tune it to run with stock wheels and tires. It is pretty exciting to be able to run something like an OLDS for a change. Be interesting to see how it compares performance wise compared to Duane's GSX. Once the OLDS is fully sorted out.