small block pulleys

So im near completing my 340 what i need to know is what pulleys can i use its a1968 block with jheads every were i look has 70 and up pulleys ill also need info on alternator bracket no air or power steering thank you

First off, what car is it in??? year and model....

Then look at the water pump to see if it's the cast iron or aluminum...

Then we can go from there...