"I am a purist, but I know I will probably never find the gem I am looking for, so I will content myself with finding the right truck for me, and restoring it to as close to original stock as I can."
Well I got fooled again. Your original question was should you restore stock "back to original or modern suspension, motor..". and about what makes the values 15-55K. Unless there are two RFrohlich's, you forgot your question and the fact that you were supposedly undecided. You were trying to decide while being a purist? We did not know that. That was a weird post.
seems like another guy wrote that "purist" line, not RFrolich