Remember that we won a world war with vehicles running Babbit-rod engines. As long as the connecting rods have the right oil clearance, they will last a long time. The clearance can also be adjusted, something that's impossible with an insert bearing engine. The T-5 was probably a huge mistake, since the only time you're likely to be able to use 5th. gear will be on roads as flat as a pool table. The engine needs to be wound up into its useful torque range to perform properly, and most stovebolters get a case of the vapors if they can hear normal engine sounds. Take the fan off and run the truck a few miles, and I believe you'll be able to figure out where most of the noise from under the hood is coming from.
Before you try to keep up with highway traffic be sure the steering, brakes, and lights are in 100% condition. The engine won't have much of a problem making speeds of 60-65 MPH or so, and driving faster than that probably isn't a good idea without major upgrades to the steering, suspension, and brake systems. Have fun!
Jerry
