So in 2 months I'm starting my SAS project. I have the axle, wheels, ect. Right now I'm gathering up the small components like brakelines, shocks, springs. My question is about the springs. The donor truck has a lift on it, and I have conciderd useing the coil overs on it, but I don't know what lift size it is. What is the length of the coils at 8" of lift or even 4-6" I can estimate from there?

 

ummm.... kinda need to know the truck and donor truck. example: a ranger coil at 4 inches is a lot smaller then a f150 at 4 inches.

 

oopppss... lol wow, ok, the donor truck is a 79 F150. The truck that is recieving the swap is 92 F150. sorry about that.

 

If my memory serves me right.... the coil spring perches on your truck are about two inches higher then the ones on the 79. So it will sit about two inches lower then the 79 IF you are using your original spring perches.

 

I'm sure someone can give you the free lengths of some stock coils if that will help you figure out what size the coils are. Might try private messaging captianp4, I'm pretty sure he has some coils he might be able to measure for you.

 

92 f150 with should be about 16in unloaded and 12in loaded.

79 f150 about 18in unloaded and 13in loaded.

Thats if memory serves me correct.

 

Another thing is that the coil bucket on the 92 arches the spring for the twin i beam. I know some people leave it but I swapped mine out from the donor truck to get them strait up and down.

 

Also box your frame where you put your trac bar bracket

 

Sounds like you are on your way to a cool pickup. If you are using the donor buckets wouldn't the lift from that rig work out to be about that much lift for the new ride?

 

That would depend if the arch in the frame from the donor 79 matches the one in the new rig. Plus if he moves the axle forward that will change because I don't think the frame in the front of the new rig is flat. from what I remember it gave me around 1-2 inches of extra lift but my bumper ate that up.