I've got an Atwood 3500# which is overkill. It's got plenty of "oomph" to lift the TV enough to set the spring bars on their perches. Makes it easy for the Bride to hitch/unhitch while I'm behind the wheel. I don't recall there being much difference in price between the 3500# and smaller so I chose to error on the side of "bigger is better". I believe the tube is 2 5/16" which I think may be "standard".
A note of caution, the Atwood is a bit tall and I have about 1" clearance between the top of the jack and the bunk end. I'd suggest getting the mounting bolts finger tight and check the bunk clearance before wrenching it tight. I didn't notice the tight fit until our first outing and I recall saying, "Oh man, I wish I'd...", but it fits so, no harm no foul.
For installation I used an auto jack-stand to support the tongue. The 3 bolts on the mounting flange matched right up to the new jack (bolt off, bolt on) Hardest part was the wiring. I added the hot lead from the jack to the spliced/ taped bundle coming from the fuse (30A).
I started worrying about the weather on the jack head so I cover it with a cut-down storage bag from one of those cheap folding camp chairs that was headed for the garbage.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks