"Stock Appearing" in no way shape or form means these motors are anywhere near stock. They are large cubic inch, high compression, very trick heads, trick cams and a bunch of other things to extract every ounce of power they can. There is nothing trick about the chassis to make them work on junk tires. They just do the best they can and have learned how to drive them without blowing the tire off early, by using power management. They are fast because they make BIG power and are for the most part lighter than they look and work good.

Same principle as all the big HP stuff out there that hauls the mail on tiny drag radials. LESS tire, MORE power management

Look at it this way. Stock Eliminator racers make most average hot rodders look stupid. Stockers go crazy fast with basically stock but very well scienced out motors. Now take that same motor, make it lots bigger, fully port the heads, raise the compression, use lightweight internals and other things. A/Stock is where HEMI cars run. The class record is high nines at about 130mph. Dudeks car runs nearly 140. That's 10 mph on an A stock HEMI. That's a LOT of power