This car has a 69 hp 440 bored and stroked to 547 inches,Indy top end ported and matched,Eagle storker kit and all roller inside.3 inch tti headers all the way out. sorry not a mechanic so trying to explain to the best of my knowledge which isn't great in this stuff!! Transmission is beefed up and is still straight forward push button not reversed pattern,the rear is an 8 3/4 742 case with 391 gears and a true trac,custom made rear wheels,car is mini tubbed and frame is tied. I built the car to drive and have fun,but it just sits in the garage! It's not a trailer queen but is a beauty,also has a front sway bar and Boergesen power steering pump,new interior and the steering wheel was professionally restored! It has a stealth 360 20 gallon fuel cell And on and on.will answer any and all questions to the best of my knowledge.