Hey guys i'm looking for some information about some factory big block pulleys. I'm getting ready to put a big block in my 71 truck and i'm needing the part numbers for the pulleys that i will end up needing. I'm going to be running a short water pump and will eventually put the a.c. back on it so i'm looking for the crankshaft pulley and water pump pulley and or the part numbers so i can begin to hunt some down. Does anyone know of any numbers or places to get factory type pulleys. And if i can recall i'm pretty sure that the crank pulley will be a 3 groove and the water pump pulley will be a 2 groove pulley. Please correct me if i'm wrong. Thank you in advance.