Needing advice asap for new suspension setup

I know this has been covered but between needing it done sooner than later and life getting in the way it's easier to ask on my own thread because my situation is aggravating at the least LOL.

So I had my suspension installed by someone who needless to say f*cked it up and it's been this way for some time (2years). Had maxtrac spindles and 5100s set at 0 installed with a 3inch block and aal in the rear. Well I was talking to Marie at headstrong approx 2 to 3 days ago and asked a question about being slightly nose high. It turns out the shop *4wheel parts* cough cough.. installed my 5100s wrong. By wrong I mean the spring seat was installed upside down. So they may be set at 0... but definitely not getting the lift of maxtracs only due to it being upside down. Thay being said I have 315s on my truck which are due for replacement sooner than later. And finding out this problem the shop said they would fix it for free and also redo my alignment. But once that seat is flipped my 315s will not fit what so ever. I am wanting 285s now and am not sure what setup to change to. I will be keeping the 5100s and maxtracs upfront. But am needing to replace the rear due to preference and also needing new leafs (gg toyota). Truck has some extra weight IE: ALLPRO bumpers front and rear and also has a are z series bed cap.. just wondering the best and most efficient way to achieve this.

Thanks in advance guys. All the help is always appreciated

 

You should go with the junkyard custom leaf pack, there's a forum on here that gives all the info needed and then some.