The Trident I and Trident II were fundamentally different missiles, despite the name.
Somewhere around here I have a technical paper on turning the Trident II into a satellite launcher. Been meaning to work that into an issue of US Launch Vehicle Projects one of these years.
More from Project Review
Behold, Book One: Boeing B-47 Stratojet and B-52 Stratofortress; Origins & Evolution
Source Node: 836665
Time Stamp: Apr 27, 2021