Opinions on towing w/K5 Blazer

[CHEVYJEFF]

Looking at buying a late 80 early 90 k5 full size blazer to replace the old 78 big 10 as my towing rig for my 23 ft boat. The boat and trailer combined is around 5000 lbs. Has anyone got any experience towing with a k5 Im wondering if the k5 is too short of a wheel base to tow with and how they handle hard braking situations. Im also wanting to find one that has about a 3" lift w/ 33" tires. Not to tall but just taller than stock. Think it will work or should I start the hunt for a 4X4 suburban???
Here is a pic of the big 10 that will be for sale when the boat season is over here in Texas. It has no rust, rebuilt tranny and front end and is all original. True Dallas truck never been out of the city. Has decent interior and paint for a 78.