lower control arm shaft/bushings replacement problem

[67 chevy heaven]

OK guys,
I am in a spot where I am at a stopping point with my suspension rebuild.
First I have a 1967 1/2 ton
I took the suspension parts off, apart, cleaned and had them powder coated.
Now comes the problems...
I decided to replace the steel bushings but I decided to reuse the original shafts.
Now when I installed the bushings onto the shafts. I took my time to try to keep the shaft centered by turning each bushing a little at a time. But the bushings bottom out onto/into the lower A arm assy. this does not allow the shaft to turn at all. Also I noticed that there is a couple threads showing on each of the shaft ends (at each end from the inside edge of the bushings)
I need to know if I can back off on the bushings a little to allow the shaft to turn. I am so confused. Can some of you guys please help me.
If it would be easier you could call me at (704)-618-1464
Thanks for reading and any help.
Shawn