My above post is a question.
To expand, I thought the engines were G-T models with 58,000lb on the Pax fleet, and H-T models (60,600lb) on the fr8tr.
I was hoping to garner input from someone who knows the answer, as I would hate to lead you down the garden path.
Certainly the manuals refer to only H-T models now (I am only a recent convert to the gas-guzzling dinosaur)