E-street vs Promaxx vs 440 Source

Also, keep in mind this whole truck project (and those that have followed along with my channel know this) has been a test lab. This 440 will likely be a part of that. It may be "built" in segments. This means, I may just bolt heads and cam install and run it "just to see", even using the factory rockers. Then pull it back down, install new pistons, etc. But again, this has nothing to do with this thread.