1/4 the 454 will because his gearing and plus the torquey (sp) motor. Off the line definetely you. But if he were to upgrade the ignition system, intake manifold, headers, and a few other things and throw on some ladder bars then you are in for trouble. Too many 350's around, it is kind of like Mustangs, there are only so many things you can do to them and once you do something to them then your neighbor already has the same exact thing and your neighbors sister does to. See what I am getting at? Either way you have a nice set up. I like those trucks. Used to have a 72, not anymore.
Are they both longbeds or short or what?