Joe, look closely at his picture - he has the old 69 and earlier style engine with the cast iron water pump and bell shaped W/P pulley... (Edited to say w/p pulley instead of alt pulley)
The stuff that you show are for the 70 and later set up with the aluminum water pump...
He should get the proper alt & pulley config to work with that... He has the proper pulley for the 69 and earlier config...