vortec style serpentine belt setup on a gen1 motor

[Project77]

okay guys I just had a 355 built it has some 905 vortec heads on it and it is for my 77 Chevrolet pickup im trying to figure out what all I need to complete my serpentine belt setup I bought the two brackets and a few pulleys from the guy I bought the motor from I just need to know what else do I need and where does it go. what else do I need to complete the serpentine belt system I will not have an ac compressor just (water pump, alternator, harmonic balancer(crankshaft), power steering pump, and the tensioner. if you could please list links of the parts you think I need I would appreciate it

heres what I got...