You obviously have aftermarket dropped uprights, but YES, stock replacement kingpins are what is needed
Your English is much better than my Russian...But I`ll try. No, That is not an original suspension part, but it does look to be compatible with the stock spindle . The replacement king pin should slip right in. Also, The thrust washer appears to be in the wrong location...It goes on the top.
I hope this will help You might could use online page translation, if you have trouble reading these. The first link is from the shop manual for the complete front suspension. http://chevy.oldcarmanualproject.com/shop/1949_53/03front/3_01.HTM And the second link is for the kingpins http://chevy.oldcarmanualproject.com/shop/1949_53/03front/3_15.HTM Thanks to the old chevy manual project for these links.