440 871 supercharger ?

after swapping the engine from my 66 to my 65, i just removed the blower carb ect complete., installed the engine and blower, torqed the blower nuts in the right pattern and torq...cranked her up until it had fuel pressure...mach pump, fired right up. shut it off to ck things out, tried to restart it, its started right up, made a noise and died....the belt had skipped and loosend, and the blower wont turn now. with belt off and blower nuts off still wont turn...no problem with blower at all...

440 871 supercharger ?