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OK. I did some research here, because I had no idea what RUF meant. From what I gleaned here, it means rear up front, yes? toyodaaddict - I guess this means yes, I am doing ruf, in regards to my front springs. However, I would add that I used the original leaves that hang all the other ones. The donor leaves were not the ones with the eyes for the bushings.
https://www.4crawler.com/4x4/4R_suspension-III.shtml
It looks to me like you may have ruined your caster angle and caused the tie rod clearance issue, all to avoid having your driveline lengthened.Lose the shim, lengthen the driveline and if need be add a drop hanger. Forget about shims, spacers, etc.
not sure what would prevent you from bolting up the driveshaft once you remove the shim. could you be more specific? It does't look like there is anything in the way.
The most critical angle to meet will be your caster angle. If you are using an IFS driveshaft they have less flex on the front joint. You will need to have a custom front driveshaft made if the one you have doesn’t work with the caster angle needed. You might also be able to take the front joint out and clearance the parts with a grinder.
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