different door hinges?

[schurg]

so, I'm to the point where I have to address my door hinges. one is cracked, so rebuilding is out of the question, the rest could use a pin replacement. I saw a set of refurbs for sale (oem hinges rebuilt and powdercoated) but I noticed they are all square, where my hinges, and all the other 'new' hinges I see have a diagonal cut in the bottom hinge. would the squares work for me? I have a '68 c10, the dude sellin the hinges says they are from a '70. did they change the hinges throughout the years? if so, did they 'improve' them? lol