OK-why do you have a tripple lower pulley? Whats sticking down from the area of the pan rails? looks like a u bend ground scrper? It also looks as if your doing an under drive pulley set??

Pulling a mech water pump and fan is quite a load plus a high amp alternator get s squeemish (maybe squeelie)

Your alternator bracket may leans in as it is only mounted with two bolts to lower block?