I’m far far up north of Alberta Canada

 

92,

Those 4.30's will be the high capacity towing axles in 2015 jargon- like the old TowBoss 350 dually. Tight turning radius "wide track" like a 450, but 8 lug wheels. Maybe a great find, better if closer.

Maybe a hot shot or someone hauling campers wants a semi-backhaul trip from (my guess Texas) to snow country. That is not a money making backhaul unless you live close by. Customs on these parts may be the pits in both dollars and time at the border. A lot easier for you than a 3rd party bringing them to you. Meet in Montana?

The front axle gear change over is very expensive (need to replace the carrier too), so a good set used is way cheaper. If truck rolled, you do not want them except for internal ring, pinion and carrier parts only.

For 25k trailer, you do not want a 3.73 or 3.55.

If hauling comercially in usa, and your pin really is 6k, rear tires on a 8-lug dually are close, but probably ok, but you probably will exceed the rear axle weight rating. Also, a ready to roll 350 dualy with full fuel hits the scales at 8,500-9,000 pounds. With 6k pin that equals almost 15k just on truck axles alone. Add 25k actual trailer weight to that 8,500-9,000 and you are pressing 34k combined actual weight. Again maybe a bust. If you are talking rating for trailer but actual load is less, may be fine. As others have said, impossible to convince weight police of capacity other than the sticker on door. If off-road or nowhere near scales, ignore almost all of the above.

 

I'm in WA state, close to Olympia.

 

do you have any steel dually wheels?

 

Sorry no, the extra wheels I had have already been sold.