Its time to replace my shocks on 2003 King Ranch 4WD. I'm not sure which will be the best for my truck. It came with a plow. So I'm thinking heavy duty. Any suggestions

 

I would definitely go heavy duty if you're running a snow plow. Maybe chat with a good suspension shop or snow plow sales place as to what they recommend
I do not have a plow, but replaced mine with Ranch-o 5000's ( supposedly a direct replacement for what my FX4 came with). They fit and all, but the ride is not the same, especially in corners. The new ones were substantially smaller diameter and maybe a touch shorter.

I would suggest some heavy duty Bilsteins or I heard of others having good luck with Monroe HD & maybe beefier coil springs

 

Thanks. I probably should go with the HD Monroe.

 

There is no "best" shock for these trucks (or any vehicle). Every shock and every driver is different. What I like may not be what you like.
I have the Monroe Gas Magnum in the front and Gabriel Ultra's on the rear. Noticed no difference in the rear between the 180,000 mile OEM and the Gabriel, but was not expecting to, was not having a problem to start off with.
I did notice a smoother ride when I put the Gas Magnums on.

So long as you stay away from the basic cheap shocks from Gabriel and Monroe, you should be fine. Mid level and up for those brands will do fine for most, the more expensive ones (KYB, Bilstein etc) also have different level shocks, but even their starter ones are decent.

As for the plow, you will need better springs to help with the ride. Shocks will wear out quicker with a plow (and many shocks warranty do not cover plow use).

 

I bought Gabrial Ultras all the way around.. They are larger diameter than stock. Do great on the county highways I drive on. Sometimes off road / dirt roads, but not too often... still do fine.

 

I did buy the Gas Magnums. I will let you know what I find. Thanks for the replies.