On my 92 (white truck in first post) the shackle was sitting almost vertical. Not what I want this time. The ride was still much improved, but this time around I am going to just bolt the front up with the factory hole, then I'll install the shackle and be able to roll the new front x-member to the rear if the angles don't look good. Sky says the Ford leafs come in slightly varied lengths throughout the obs years. Shorter spring sets will give the steeper angle. I hope mine are longer this time
James,
Just a couple of ideas for you with regards to shackle angle.
Sky's 'new' RSK kit for the SD springs (Bear with me, I know this is not the direction you are going) come with a new rear shackle bracket.
http://www.sky-manufacturing.com/new/images/products/327_1327004686.jpg
They also sell this bracket separately
http://www.sky-manufacturing.com/new/detaproduct.php?id=318
Sooooo ....
IF your shackle angle is poor after you do the swap, you could go with these. They bolt into the factory hole locations. Keep reading, its not quite that easy Hombre'
I am converting my truck to 05+ axles with coils up front and removed a lot of rivets from the frame for all the brackets I need, and I am not going to lie to you, it was a daunting task. I tried;
- Grinding an X with a cutoff wheel and chiseling the end of the rivet off. This worked like the bee's knee's for the rivet head.
- Where I could not get the grinder onto the rivet head I used an Acy/O2 torch. This worked OK, on the other side of the rivet, opposite the torch tip, it gouged into the frame. Initially a lot, then someone set me up with a tip bent at about a 35 angle. This worked better but still not great.
- This still left the rivet in the frame and bracket. Pneumatic air hammer worked on 3/20 or so. An 8lb hand sledge with punch worked on another 4/20. The others 13/20 had to be drilled with pilot hole, and then stepped up in drill bit size, then wail away with the sledge and chisel to clear them out.
If you "roll" the RSK bracket backwards, you will also shift the axle center line to the stern. (Notice nautical term, this applies to old crew cab long bed vehicles)
AND if you are going with a slightly larger tire, I think your tire rub will be exacerbated, further cutting down on turning radius.
THIRDLY, with the shackle in the rear, the spring will lengthen towards the back when it travels up, and again this may not be the best due to wheel well and other interference points.
Do not get me wrong, I think the RSK improves the ride quality on these old trucks immensely, I am just thinking a out loud a little tonight.
I hope my 97 has flexed a little through her life and loosened up these brackets on my truck, because I need to remove them in order to install the radius arm brackets. I know, its only 8 little rivets, but man, I am done.
If I am wrong on my thought process, please post up. Knowledge is best shared.
Cheers, Chris