A biturbo 454?!?!?!?! Holy moly mother macree.....

The craziest I ever saw was a supercharged 70-something Cadillac with the 500ci v8, with tons and tons of work done... it broke the dyno that tried to test it!! They estimated it at just over 900hp. The guy said he had to go really easy on it because he wasn't sponsored anymore, and couldn't afford the transmission work that was inevitably neccessary when 900hp was slammed to the ground for any serious length of time...