ive got a lift 5" front 4" rear. The rear is just blocks. I am thinking of putting my 2.5" coil spacers on the front, and another 2-3 inch block in the back. I was wondering if i had enough brake line slack or not. Or if its even possible?

 

DO NOT put double blocks in the rear! You WILL wrap and crap your axle out. If you really need that much lift get a custom set of springs and some track bars. The springs are really cheap maybe 5 or 6 hundred for the set any lift you want and no more blocks!

 

x2 i highly recomend NOT double stacking blocks in the rear believe me i learned the hard way(broken leafsprings, thrown driveshaft) and i ended up gettin new leaf springs afterwards anyway... save yourself the trouble and do it right the first time. now as far as puttin a spacer above your coil ive heard of people doin it but some of them ended up having to get different control arms but that kinda depends on what lift you are starting out with... and imho i would go ahead and get new extended brake lines just to be on the safe side, you dont wanna flex your suspension out one day and pull a brake line apart

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what truck are you doin this to also???