Hey Cliff. It has an "Inverter" and will do "70 MPH+" Must be the BBC power. LOL. You might want to save the pics for your archive. It looks to be the same model as yours. If you look closely you can see that elevated deck line.
"1976 crusader jet boat 21 ft day cruiser. The boat has a fresh paint job, new runners and floors, rebuilt Berkeley Pump, with inverter (rooster tail) rebuilt Chevy Big Block 454 bored over 30 (70MPH+), MSD ignition, demon 750 carburetor, through transom cooled headers that sound great. Still have the teak swim deck looks great.
This boat has been a project for the last 4 years and with the new addition to our family my wife wants a safer more family oriented boat.
I would say it is about 90 % complete just needs interior, rub rail and a few pieces re-chromed and this boat would be lake ready in no time.
I have over 17K invested but will to sale for 8K Cash only OBO."
http://dallas.craigslist.org/ftw/boa/2493872792.html