Yeah,you're talking about the drag trucks? Probably about the first ones,as far as I know. The Fords and Dodges ran an assortment of powertrains,but it wasn't uncommon fro them to run the Detroits. Maybe even safe to say mostly Detroits. The GMCs could have other power but usually were Detroits. That green Cannonball on the first page has a blown Detroit screamer. I love that truck. I got to see it roll out on a joy ride.
Here's a cool GMC. I wish it was mine:
