HELP! finding correct U-joint

I FEEL like an idiot last night there i was squeezing through the madness under the car maneuvering my hands and arms through the tight squeeze which is an A-body with a four forty step number one remove the pin off of the coupling body to slide out the column in one fell swoop.

step number one disaster.
After a few attempts with short, long, thin, too thick of a rod that would serve as a pin press i finally found a long/short thing/thick so so' brass rod that would help i set in place and hammered the thing in one, two hits i felt it push out 1/4 of the pin out come out from under the car check it out think to myself that should be good enough to pull out with pliers or something go back under and ... and... MY rod is stuck jaja'

Not having none of that so i spray the thing down with penetrating oil and leave it for the night.