According to Chrysler, they made several versions of each engine. One or more versions were put into police cars (usually a normal spec and a tuned version). The tuned 360 that they provided produced 220bhp and 280 lb/ft of torque (this is the twin exhaust four choke set up similar to that used in the 603/Britannia). The 410 and 603 had similar performance, whereas the Beaufighter/Brigand had performance on a par with the series 1 411. If I had to guess at a power out put, I would suggest around 280 for the 411/Brigand. The later series 411 and series 1 412 had lost a little due to emissions (even with the bigger 400 engine) and were down to about 250-260bhp. By the late 70's the 400 and 440 had been strangled further and barely produced more than the tuned 360, but with much poorer fuel economy.
https://www.allpar.com/squads/engines.html