Dave, says it right. Its what I did on my 37.
About the 52 I have. With the 15", 6 lug wheels I used the wheels just plain did not look good in the original location....or perhaps I should say I didn't like them!
So, I cut off the swivel joints, got a set of perch blocks from the Dodge place.
This may get to be more than you want to do but its what I did.
I pulled the springs,took apart & cleaned along with even puttign some polyliner in between them to help them flex as they did show some signs of pretty good wear. I replaced the shackles and while I had them out I turned the springs around. It should help center it but I still did not like it... Everytime I walked in the shop I said ugh.
So, since I had 3" lowering blocks it was a tat to low, for me, so I cut off 1 1/2" of the lowering block, then welded a 1/2" steel plate to the lowering blocks which now made the truck lowered 2". In that steel plate I drilled holes as Dave mentioned, after I had determined where I liked the wheels centered in the fender. With the 2" lowering you can get a set of longer U-bolts at Advance Auto....but if you lower it 3" the U-bolts are not long enough!
I will also add that I modified my bottom U-bolt plate to 'work for me".
I might add, for moondoggie, to be sure and check and double, check the measurements. It seemed no matter where I measured the driver side was always off about 3/16". Yes, I marked he floor and did a wheelbase check ect ect and it all said that somewhere over the years it must have been hit, in a bind or something. Nevertheless, I drilled that one hole 3/16" different from the passenger side and it now looks and measures dead on.....which I'll really find out when I get my front end man to do a 4 wheel alignment.... if its off, we'll just flip the lowering block out and drill a hole where it needs to go!
This is long moondoggie, but maybe it'll keep your gears turning until you get it where you want it.... which may be different from all of us????
