I am going to do the ball joint spacer lift up front, and 1.5" longer springs in the back, and no not cruiser coils. I have read a couple threads on here that say to extend your brake lines with the cruiser coils, but what if I am just lifting the back 1.5" to level out with the front bj spacer lift?

 

stock lines should be fine unless you plan on doing some crazy articulating... if your truck is jsut a street truck its fine

 

with 1.5" you'd probably be fine.
if you're using the stock length shocks you wont have any problems

if you're not using stock shocks (ie longer shocks) then i would put the new springs in and the new shocks on. then let the axle droop all the way down and see how much tension there is on the line. then try jacking either side of the axle up and seeing if there is any tension on it.

 

ok thanks guys... that helps...

 

As nopted, brake lines will be fine, you'll want to adjust the LSPV sensing rod on the rear axle to account for the lift and restore the rear brakes to normal:

http://www.4crawler.com/4x4/ForSale/...l#OrderingInfo

 

but if hes only lifting it 1.5" in the back. thats essentially returning it to stock and wont need a LVPS bracket???

 

Lifting back to stock that would be correct, if lifting 1.5" over stock, then that is lifting. Lifting is seen by the LSPV as no weight in the bed and it backs off the rear brake pressure, giving reduced braking effectiveness. Just something to consider if you notice the brakes don't work as well as before, after installing the springs.

 

well to me, and this is just my view, the 1.5" springs that downey and performance product make are to compensate for the rear sag, thus returning it to stock.

 

So as I said, if they indeed do just restore the ride height to stock, then you are fine w.r.t. LSPV and rear brake lines. If they result in lift over stock, then the LSPV should at least be considered. 1.5" *does* make a difference. How do I know? Becuase when I put my 3.5" lift springs on my '85, I also installed an LSPV bracket supplied by the spring vendoer, supposedly to match the lift. Later after noticing the brakes were not working as well, I investigated and found that the LSPV adjustment should match the lift. I was supplied a bracket that only raised the arm 2", or 1.5" short of the actual lift:



So, I made my own bracket and lo and behold, I had brakes again. Then later, I eliminated the sensing rod and bracket and just tied the LSPV up to a turnbuckle (for adjustability) attached to the floor of the body.

http://www.4crawler.com/4x4/4R_suspe...ortioningValve