Column shift problems

[easyrider]

I have just purchased a 68 Chevy C-10 with manual shift. The gears don't grind but the shifting is very tight and binding. Is there something inside the column that would make this hard to shift? At bottom of column is very black with old grease. Linkage is loose and bushings are worn out, so that isn't the problem. I really don't want to disassemble the steering column unless necessary. Just wanted to see if any of you have had this problem. Thanks!