Bushing sizes

[1965 F350]

I have an old 66 Ford F100 4wd that I would like to buy poly rear leaf spring bushings for.
I'm trying to find the right bushing for it. It seems to have a mish mash of different year parts on it, so I'd like to order the right ones the first time.
This is the possible part numbers I've found by looking up by application:
4.2102G
4.2113G
4.2139G
4.2143G
and possibly
4.2126G

Is there anyway to get the bushing sizes from these part numbers listed above, example ( outside dia. of bushing, what size bolt the sleeve fits etc.) 
Thanks

[EnergyGeek]

I am showing that the 4.2102R is the part # if we were to look it up by application.  You can always refer to this page http://www.energysuspension.com/universal-products/link-flange-type-bushings-universal-mounts-isolators.html to measure by size.  Please give customer service a call also with your part # listings and they'll be at your verbal disposal.

Energy