dist oiling Q

70's electronic dist. I disassembled it (except for gear/shaft) & cleaned it all thoroughly with solvent. should I oil the shaft & if so how would I go about doing it and I was thinking of pulling the pin/gear & reducing the end play with some shims (which if I did that I could oil the shaft at that point in time). is this needed & would it cause any gear mesh problems? thank you for your time. RR