Lift Question #3,278

[special-K]

I can`t keep some things straight in my mind to save my sole.I have a`91 Suburban w/4" Tuff Country springs.It needs a motor and the body is 1/2 rough.I liked it ok when it ran,but looking at it sitting there I`m not motivated (gotta be picky where my money goes these days) to get into it.I could buy another one with a nice body and running motor for what the bodywork would run me.I could just swap all the lift stuff over and instant cool Suburban.And,it`s got the 4L80E w/stand-alone computer.That`s what I`d really like to do,but I haven`t had the money to pick up another Suburban.
I have my`72 K2500 that needs tires and I want to lift it 4".So,the 35s I have won`t fit until I lift the truck.I keep considering yanking the t-case & trans from the Suburban,along with the springs,axles,and hydro-boost system(doors/tilt...),and scraping it.

My question is...If I use those springs on my`72 I know both the front and rear are longer.The rears are 56".In the rear I`d need to relocate both the front & rear spring hangers to stay centered,right?So,how much more will the truck be lifted over the 4"?Will it be a noticable difference?The rear wouldn`t affect it because the frame is straight there.The ront continues down,but moving 2" forward doesn`t bring it that much lower and being only one end of the spring the lift will be 1/2 the total difference,right? The same on the front.By the time I move the rear mount it will only raise the truck 1/2 the amount of the lower mounting point.So,I`m thinking I may have just a healthy 4" lift.The high side of 4",more like 5".Am I right?I`m asking because I really don`t want it to big to still mount 285/75s or 255/85 tall skinnies.Or,even 12.50/33s without getting too lanky.My other truck will be about 7"...6" springs w/zero-rates...and will run 35s as well as an occassional 37.I want interchangability between the trucks.Yet,run a bit larger on the second(shortbed K/30)/more travel room and run a bit smaller on the first(K2500)/more travel room with under 35s/healthy stocker look when I want(and/or can`t afford big rubber).

If the `72 will come out around 6" lifted I`d just as well take the 6" front springs I already have,get rear springs,leave the Suburban alone until I can get another w/good body & running,and just get other springs for the shortbed when I get there.If I do part out the Suburban I`ll probably swap the whole running gear:4.10 axles,4L80E,NP241,hydro-boost.It`s the semi-floating 14-bolt w/Gov-Loc and I have another 4.10 14-bolt full-floater for spare as needed.The`72 has:3.54 axles,TH350,NP205,vacuum-assist.I`m just thinking I like the 4.10 w/overdrive and 3.54s may not pack enough power for hauling in o/d with the 35s.