C10 Towing - feedback wanted

[mongocanfly]

I've pulled my share of loads over the yrs..I've pushed the limits more times than I care to admit..
I pulled a racecar all over the place, as well as loaded horse trailers,campers ,4 wheelers,you name, it I pulled it with my bone stock 85 with a 305 and 2.73s
Truck wise you have a solid setup...but I'd say at 6500 ,your probably at the upper limits I'd feel comfortable with..
I pulled a tractor on trailer that weighed in around 7000 with my 99..although it pulled it just fine you could tell I was overloaded..wound up adding airbag helpers to the truck..
the bigger boats I've pulled have surge brake type hitches on them..those work great...are yours elec or surge?