Lost placement on gearbox.

[c10boob]

So the gearbox on my 71 was leaking power steering fluid so I removed it and replaced the seals where the steering shaft connects. When I did this, I marked the relation to the pitman arm buuut... my marking was not made good enough and rubbed off when I was replacing the seals.

I know I didn't move the gears too much as I did not dismantle much of the gearbox but I've also never messed with one of these and am unsure what I should do. Is it typical that being off by a small amount can be adjusted during an alignment or do I need to do something more here?