Name's Andy! Funny thing, I'm really not that big. Only 5-9 180, but all my buddies in the Army were taller and thought it'd be funny to call me Big A, and it stuck! Even my old high school buddies call me that and I was always the shortest guy in my class, LOL!!!
That's awesome!!! To be honest, I know these engines are referred to as rattle boxes, but it's really all in the way you mount the engine. There's a lot of disagreement on whether or not an external balancer makes any difference. Some will swear by it, others say it's a waste of money. The best way to deal with vibration is to keep the valves adjusted and use fluid mounts. I went a different route and used mounts from at '96 12V and a '99 24V Dodge Cummins. I used the passenger mounts from each yr as they are both angled and the '96 is offset and it worked great to clear the starter, which is driver mounted on a Dodge Cummins. The mounts are great and transmit very little vibration! I didn't use the front mounted fluid mounts because I'm running a/c, and I needed those holes for the brkt, which I got off of an old Cummins Ford school bus. Also, you can line x the oil pan. You'd be surprised how much noise comes from the bottom of the engine. The newer big rig diesels isolate the pan to help solve this problem, but in the end, you just need to sound deaden and insulate the heck out of the cabin! You do that, and you'll be a happy driver while getting in the mid 20s at highway speeds for fuel mileage!
Here's my thread and a cpl others for you to get some ideas from:
http://classicbroncos.com/forums/showthread.php?t=210808
http://classicbroncos.com/forums/showthread.php?t=174452
http://www.4btswaps.com/forum/showthread.php?35353-Early-Bronco-4BT-build
You gotta love the old CW tunes!!!!! LOL!!!!!!!!!!!!!!!!!!!!! I got lucky and married me one of these beautiful Texas girls!!!!