How much weight/length trailer can I tow with a Shortbed K10

[Destructo]

Alright, heres the question.

I have a 30ft travel trailer that is bumper pull and has a GVWR of 6k lbs, dual axle of course with electric brakes.

The hitch setup consists of a giant 2 5/16" ball with sway and load distribution hook-ups and it will be run with BOTH weight distribution and adjustable sway bar.

Assuming I have a 350 with Holley 4160, Weiand Action+Plus intake, Summit 1101 cam, headers, dual 2 1/4" mandrel bent exhaust with high flow cats and flowmaster mufflers, 4.10 gears with 33x12.5" tires OR 31x10.5" tires with 3.73 gears. 700r4 with B&M 24k lb cooler, corvette servo, .500" boost valve and 10k miles on rebuild.

12 bolt rear axle with 1/2 ton springs and air bags, Class 4/5 hitch (10k lbs).

And of course an electric brake controller.

Will it be alright towing this thing? Its pretty big, we used to tow it with a 79 G30 chevy van that had a 350 and th400 and 14 bolt rear axle. We have towed it a couple times with a 97 Suburban with 5.7L.

The only drawback I can see if the short wheelbase, could cause issues, but the truck is gonna be quite heavy considering its going to have custom bumpers front and rear and a 110lb Warn winch on the front and a Warn bumper on the front and a rear bumper that probably weighs 50lbs more than a factory step bumper.