Howdy guys, been awhile. I took my old front leaf springs off and found 2 caster shims under each leaf spring and Im not sure if they were put on from the factory, it does look like old factory stampings on them. One of them was broken in half and the others still in okay shape. My question is since I am putting new leaf spring sets on will the shims still be necessary. I will get an alignment after Im all done. What can you tell me about caster shims? After reading the old '50 manual it mentions some models have them and some may not from factory? Thanks guys!