BigBlockV6GMC
Sorry for not responding sooner....didn't notice that you responded. I'll make a change to the forum display that will show the most recent posts on the bottom?
As far as a 4X4 3500HD..this is from the history section:
"GM never offered the C3500HD in four wheel drive off of the assembly line, however several aftermarket conversion companies offered them in a 4x4 version with either a Dana 60 or Dana 70 front axle. At least one company, Monroe Truck, was offered as a ship-through 4WD upfit using the RPO code VCB."
Would like to see one of those conversions myself.
Ed
First post here, thanks for letting me join.
Funny, your quote on the Monroe info is what I posted a while back on several places online after I got the info right from my RPO list on my 94.

I had to look for several years before finding the one I wanted. Had to get it in Kansas and drive it home to AZ.
Mine shows that they weren't all 10 lug fronts as mine has 8 front and 10 rear. The 10 lug hubs were an $800 option that was skipped and now I have to correct on my own. It seems 4.63 is standard for two wheelers and 5.13 for four wheelers as every factory 4x4 conversion truck I have seen has had 5.13's. I missed out on one on ebay a couple of years ago that I have kicked myself for ever since as you can see here. This was not a factory job, but it had everything I wanted, crewcab, cummins, nv4500 and 3.73's already done. Missed it by $100 at the last second. Thought you might like to see it as well.
Tim