Getting a 2954 boxcar apart

On my car, they are just friction fit and were very difficult to get out. I ended up clamping on the head with visegrips and twisting.  They do come loose, but I was very nervous about potentialy breaking the car just as you no doubt are.  Maybe someone else has a better trick?

Thanks Dennis.  During the day, I soaked the pins in Liquid Wrench and this afternoon was able to twist two pins off, so at least I know they are pins and not screws.  From an earlier post, I found out that the trucks could be taken off from outside the car.  I found out that a tab held a plate in place and when bent down it allowed the plate to slide toward the end of the car allowing the trucks to drop off.  Made grabbing the pins much easier.

So, lets see if the Liquid Wrench does its job on the remaining two pins.