1996 Dodge 1500 4x4 ext cab

I don't have a Trailmanor yet, but I am planning on buying one. I now have a Dodge 1996 ext cab 1500 4x4 with towing package and class 3 hitch and wired for trailer brake. Now the big question: Will this pull a Trailmanor up steep highway grades? What model TM should I look at to give me the best overall highway performance? Does anyone tow a Trailmanor with this pickup?