You don't need to check the number they are visually and physically different.
The one on the left is a one piece seal crank. The one of the right is a 2 piece seal crank.
The back of your block should have a seal holder similar to this bolted to it.
I am curious though, I have been told the switch to one piece seal cranks was in 86 and your engine number matches that year. Let me know if it isn't though. I have heard some people saying some 86's came with the old style crank. Your block also doesn't even have the bosses for the roller lifter spyder. I know they are not drilled in all of them but every one piece seal engine I have seen has the bosses. So let me know what crank you have please.