Your cousin has to understand that honda motors (with the exception of a few) are not by any means made for performance like the corvette or the mustang. They were built to be economical and reliable. That being said, if your cousin is intent on racing at that level (and I am going to assume for drag racing) than he needs a motor like the b18c or a b20 block mated with a vtec head. In addition he may want to bore/stroke the motor to a higher displacement. Also, some type of forced induction is a must. To get a honda motor to perform at the level of corvettes or mustangs while keeping it all-motor is nearly impossible and very costly. He will also have to have everything tuned professionally as far as ignition timing, cam timing, boost pressure, fuel pressure ect. He will need a new ecu reprogrammed to manage some of those things. I hope your cousin has some big money to play with.