Thanks Bob for the feedback.
After a couple of days spent calling area salvage yards I found one that had a couple early 70's F100. So, today I was able to get out. I got a set of 73 truck triple groove pulleys. Crank = D3TE-6312-AB, Water = D3TE-8509-EA.
You mentioned 67-72 F100.
So, my question. Will these 73's fit my 69 390 ?
Thanks again for the help.