The carbureted Honda unit is good for 81 horsepower and 64 ft-lb of torque, and is shifted through the stock five-speed transmission via traditional stick shift. Its steering wheel is a wheel. The seats are seats. Really, for only slightly resembling a car, it's said to drive very much like one. Except the speedometer doesn't work, you can't go in reverse, and the turning radius will make big-rig drivers pity you.
In addition to the descriptive posting, the seller included a link to his build page (on a Datsun 510 board, no less), which included a link to a build summary on Build-Threads.com. You could easily lose an afternoon scrolling through engineering solutions involved in hand-building a road-legal vintage motorcycle/car mashup. Or you could watch these videos from the builder's YouTube channel and start counting your sixpences.
PhiLOL actually likes the tuna here, but abhors structural rust. Save the manuals.