Lifts and load capacity

[Pano]

I have an 87 GMC 3/4 ton 4x4. I use it for pulling a 27 ft travel trailer and hauling mulch wood etc. It has 2 leafs up front and 8 in the back which I believe are HD leafs.
I will be replacing the leaf springs and want to maintain or increase the hauling capacity. The truck will not go offload. It is not a daily driver and I am not concerned about the ride.I am running the stock 235/85/16 with dog dishes and plan to keep the same or replace with a slightly wider tire on steels to keep the stock caps.

My current plan is to go 3 or 4 leafs upfront for a potential future plow and the 8 leaf HD in the back. I was looking at Eaton or another OEM type supplier and considering 1inch ORD zero rate leaf blocks all around for a 1 inch lift. Eaton offers 1-3 inch increases but not on the front because they leafs are negative arched. The website says they do but I called them and eaton suggested the zero rates with a stock height front leaf. I have already read all the opinions about the zero rates up front.

Bottom line is I want to maintain or increase my hauling capacity and lift 1-2.5 inches if possible.

Do the 2-2.5 (ruff country, tuff country, skyjacker etc) lifts maintain the load capacity of OEM leafs? What do you guys think? Thx.
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