As long as you're confident that they both seated when you installed them I don't think I would worry, BUT, I've never replaced an axle yet so I'm just talking!
Aftermarket cv can vary in many ways. It might be just a hair longer stub.
I had one that was too long in my 5th gen. Couldn't tell until I buttoned it up and tried spinning the wheel. Half a turn and it would bind up. Pulled it, set it next another axle I had laying around, and it was a little longer.
Back in 17', I went through a shitty year of swapping aftermarket CVs every other month. And of course the seal was getting worn and started leaking.
Even had a factory reman tear in a months time. What a PIA.
I bite the bullet now and just buy the ridiculously over priced oem for $400.
The drive from Charlotte to CB will definitely give you plenty of reflection time with all the miles of plain countryside, haha. I do that drive about every other month and it'll sure rack up the miles quick!
I think I'm starting to get a slight rear main leak on my '03 v8 as well. I'm curious to hear how the seal revival works for you, did you use AT-205? I've been thinking about giving it a shot on the next oil change.
Heading for Tierra del Fuego?