Adam,I appreciate the offer of help on this project.
But being I like trying things,I figured I would give this all a try/. If I succeed,I can say " I did that" Or if I fail,no one to blame but me.After installing the bushings in the other 3 pistons I put them aside for a while and did something else.
After a break, I went back at it.
So I got the Timesaver out I have had for years in the cabinet. I got the 1/2 inch brake cylinder hone and such out of the tool box.
I determined there was wear on the wrist pins.Darn,I woulda thought brass would wear out before steel. So I worked on the wrist pins and got 4 cleaned up a bit.To remove the high spots I used emery paper with valve lapping compound and then went to time saver and oil on some more emery paper. seems to cut down the metal faster than just emery paper alone.
I then went thru the pins and tried each 1 into each piston till I found 1 that would sorda start. I kept those together and went thru the other 3.
I honed each side until both ends of the wrist pin would go in.then I would rub the high spots off the wrist pins using a magic marker to indicate first until the neighbor showed up and loaned me his can of dykem.
Once I got the wrist pin going thru the 2 bushings I then got to thinking about this pin needs to be straight and free to turn. What could I use to do the final fit? HUM ,the wrist pin it's self with oil and timesaver on it.HUm,how to turn the wrist pin? I remembered trying to use a boiler tube brush to clean out the wrist pins and it was a very tight fit. So I stuck the brush in the cordless drill, oiled the wrist pin,put Timer saver course in both bushings and started in, after a short time I added more time saver,then went to the fine grade,and it spun and went back and forth just fine.
I cleaned everything up,put oil on the wrist pin and if you hold the piston sideways, the pins falls out easy,pushes back and forth inside easy and spins easy inside the bushings. No up and down slop like they had before bushing replacement.
I think being inline is the most important aspect of the thing and I think using the wrist pin and yellow Ajax as I call it,made sure of it being inline.
I know,this is a job for professionals,with fine tools and years of experiance.But I am 1 that likes to try to do things myself,and with the holidays coming on,I needed to be doing something to focus on as this is not the best time of year for me.
IF the job fails,no one to blame but me.If the job works, well I can proudly say I did it.
Either way,I learned alot, if my time becomes worth more than a nickle a hour,mail the (((( things to Adam!
Well, I sulked a bit and fiqured well I got more.SO I knocked those bushings right back out and put them in the freezer. That is when I discovered 2 of the other pistons I had scrounged up were of the larger bushing type! 
Well It dawned on me I had another stash!.So I crawled in the junk pile to a big metal truck mounted tool box and sure enough,4 more pistons of the same bushing size as I needed.So they are soaking in the varsol. In the meantime I did 1 more piston as far as bushings.Got them in,no problem.I held that piston with both hands until I set it down! 