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quentinlindsay wrote:
I can do the math!
I am fully confident that my configuration - properly loaded - will be more than sufficient for my truck to handle.

Then it is probably time to do the math. Actual "real world" rear axle weight vs. GAWR vs. calculated loaded pin weight is the only way to know the answer with a reasonable level of confidence. Tire capacity is the weakest link and biggest safety concern for the majority of 3/4 ton diesel rigs.

Last time I considered upgrading to a heavier fiver (with a heavier pin weight), I weighed the old setup first to verify there was sufficient tire capacity for the difference in pin weight. With many years towing fivers, we had confidence we wouldn't load a new fiver any different than previous units. But someone without an existing loaded fiver to weigh or less experience needs a bigger margin when calculating "real world" pin weight vs remaining tire capacity.

Just about everyone here has stated that carrying capacity is the biggest issue with 3/4 ton diesel rigs, and that comes from experience. Most likely you will be OK with the combo, but there is a lot of variation in dry pin weights for similar dry trailer weights. Yet so far you have failed to state dry pin weight or brand/model or asked any questions from others about their experience with dry vs. loaded pin weight. So, your math might be a case of garbage in - garbage out. We are here to help, it is your safety and everyone else's as well.