I would just like to say thanks to Jack for renting me his Whitaker Tools 7.3L Injector Sleeve puller and installer
As some have experienced here I had diesel in my coolant.. after searching for hours here on PS forums I found a gentleman that had a set of these tools. I PMed him and asked if I could rent it from him... and he was gracious enough to do so. The tools worked perfect... in a few hours time I had these cups (all 8) swapped out with no issues.
I work for a Ford Dealership here in CA, service writer, and even my shop foreman was skeptical... I was on the receiving end of a lot of sh!t about not pulling the heads out. However it went very well and the truck is up and running 100% again, 3 days after completion my wife pulled our horse trailer a total of 5hrs round trip with no issues.
Plain and simple this tool does the trick... if you need to do this job PM tipsyjack to rent the tool at a reasonable price.