I have A 74.5 f150 3" body lift and 37" tires. i was starting to put in the lift form skyjacker and i looked at the drivers front when i got it one and the new coil spring doesnt sit in the spring perch right. the stock fits perfectly but the new coil seems to be larger in diameter. I also should replace them because one has a crack close to the two mounting holes. dangerous!!!!. so is there anywhere i can buy larger spring perches/cup for the newer coils. or did the 250 or 350 have a larger diameter coil spring so i can steal the sping perches from them and it will work. until i figure this out i am stuck. help.

 

is this a 4x4 or 2x4, is the lift you got for the truck?

the lift coils will be a larger diamter bar....is that what your talking about?

 

My rancho coils were a bigger wire diameter. I filed out the one hole on the side, and loosely bolted the center in and then the side one and tightened them down. Loosely assembling before tightening everything is the trick on these old trucks.

 

yes a 4x4. and the diameter of the wire is bigger then the original."thicker" and the bottom of the new coil doesnt fit in the cup properly. i got the lift from 4wheelsparts for a 73-79 f150 4" standard lift (coils,c-bushings,add-a-leafs,centerbolts,shocks,shock boots,pitman arm, radius arm and trac bar bushings)i havent checked if there was an inventory sheet to make sure if the coils are the right kind. i will check that tonight and repost tomorrow. thanks for helping. idk what to do

 

The lower spring coil bracket is probably bent and does not seat the new coil spring properly. The new coil should fit in the lower spring coil bracket. The new coil springs are made with a larger coil in diameter. Jeff Bronco's Graveyard and National Parts Depot carry the part. Make sure to rethread and install new bolts to the lower spring coil bracket is needed.

 

well i decided hey mom wants the truck done so i took it to the main off road shop in town tonight, ya shame on me, i called sky jacker and it was the right coil size and part number no i went the easy way but i am also getting duall shocks radius arm drop brackets and getting a heli coil in the manifold where the pipe mounts. sorry guys kinda picked the easy way out

 

How are the C-bushing and Radius Arm Bushing?
Here's a picture of the C-Bushings. https://www.ford-trucks.com/user_gal...129424&width=0
Probably a good time to replace those bushing.
Check the track arm bushing too, those might be worn.

Dual shocks setup. https://www.ford-trucks.com/user_gal...129425&width=0

I think 37" tires is pushing over the limits of the 1/2 ton drive train and axles.