I have a 1995 F350 SRW long bed crew cab truck with 175,000 on it. Runs great. I just purchased an Arctic Fox camper that is about 3500lbs. My previous camper was about 800lbs lighter. The new one is heavier and also taller. I feel the lean in turns more.

Would adding a sway bar be a very noticeable difference and worth the money?

 

Yes definitely, adding one front and back will help more and going with oversized aftermarket bars will help even more.

 

can i just do the rear?

I am most likely going to get a newer truck but maybe not for 6 months or more. Trying to make do with what I have for now.

 

You could but if you are junkyard shopping and find a truck with both grab them. Here is why.
Little story. My last F150 had front and rear swaybars. I was on a trip carrying a load in the back (~1500lbs) when one of the swaybars lets go. We were travelling over rutted highway and I had to slow down because it suddenly became hard to keep the truck in my lane. Turns out one of the rear swaybar end links broke which was an easy fix but it demonstrated the pitfalls of a single swaybar. Maybe it would not have been as bad if the front had let go but I don't know, I have seen it stated that a single sway bar actually makes a vehicle more unstable than no sway bar and the absolute worse case scenario is a rear only bar.

 

I'll chime in and say that sway bars are great. All vehicles should have at least a front one. I do agree that having only a rear one causes weird vehicle behavior. Most of these trucks seem not to have them. My previous truck had front and rear which handled great for an old truck. My present truck only has the front at this time. Both came with none. The handling was really lacking.

I had front and rear on my vintage Mustang and went back to only a larger front bar. That worked the best so far there, but of course it is lighter weight, has lower center of gravity, and does not haul a particularly heavy load in the rear like a truck.