Just came across this thread the 6bt weight is just a little shy of 800 lbs dry it is about 100 lbs heavier than the GM 6.2 which I took out and put in a 5.9 cummins about 16 yrs ago the truck is still running good it is a 1/2 ton 1983 Chev. w/3.42 rearend gears with a 20% US gear overdrive

Ok I am confused on how much they weigh I now have herd 800- 1600lbs

I am in the same boat, but I have a 79 J20 pickup, thinking/hoping to do a diesel swap, looking for a local 94-98 5.9 truck thats been hit

That is what I am looking for also. I have been looking at the Insurance Auctions but they want a ton of money. Where are you located?

If by dry they mean stripped, you might get a 6BT that light.

I can vouch for the 4BT being really, really close to 800 Lbs installed weight, which is the only weight you need to worry about.

the marine version of the 6bt weighs 960lbs. dont know about an auto. i could weigh the one in my shop tomorrow..

I was wanting to put a 6bt in a 1/2 1992 gmc...which would be better the 4bt or the 6bt and what would I need to "beef" when I do this?

You meant 4bt right? Some 4bts are 750 dry( no flywheel or electrics)www.4btswaps.com has lots of good info. Put in 39 chevys to Dodge WC (53?) McInfantry. Can be turned up to 150-200 h.p. and still be reliable. Can get more but sacrifice longevity and mpg.