It becomes apparent that you have never had a similar equipped big block truck if you think a 318 will pull with it.
Modern Magnums with modern transmissions might be a different story, and traction along with a few other things may equal out the playing field, but an LA 318 will not out pull a similar equipped big block truck. When you pull a heavy load at more then 20 mph, the difference is as clear as day and night.

But all that said, don't discount the 318 just because its a 318. Gene