JBG has discountined or changed the 4" and 6" super flex lifts, but the new super flex are 5" and 7". I have a 78 f-150 with a 460. I've currently got 4" RC and 35s that are less than a year old. I want to have 37's and 20x12 rims. I want a good riding lift but the 5" super flex recommends 34x12.50 and the 7" recommends the 36x12.50. Which seem like way big of lift for small tire. The skyjacker 6" recommends 37s. Does anybody have any knowledge on what the Super flex lift 5" will fit and not be stuffing along with the 7" super flex? Or if they're are any other better riding lifts? But I believe deaver lifts are hard to beat

 

Just wondering as to which superflex 5" or 7" would clear 37x13.50r20 and he decent riding, possibly even a skyjacker. Just depends on the recommendations. My driving with the truck is 20% off-road with 80% on road driving.

 

You can run 37's with your 4" just fine with no rubbing, as long as your wheels are too broish
So go with the 5"

 

I have a set of the 6" Deaver Superflex coils in the front of my 78. I haven't really driven it much with them but they lifted the front 3" more than the 6" Skyjacker ones I took out. I heard that the 7" coils are the old 6" because they lift so much. I am running 36" Iroks on mine and they cleared fine with the Skyjacker coils.

 

Old jbg 4" with 37 goodyears

 

Sorry it's taken me a couple of days to reply. But I was planning on a set of 20x12 with -44 offset rims with 13.50 wide 37s. So the 5" should be good and ride better than my current rough country lift.

 

Just my personal opinion... but anything over a 4-5" lift on 36-37" tires doesn't look right on these trucks.

 

This is my 77 F150 2" lift, and my buddhe's 78 F250 4" lift. Both on 38.5" boggers. My fenders are trimmed, his arent. Mine are 11" wide tires on 8" wheels, his are 11" wide tires on 10" wheels.