Engine now smoking after new valve seals

It's not uncommon for a vehicle that was a heavy smoker out the exhaust, to smoke for a long while after re-ring, or bad guides, as the exhaust pipes and mufflers were full of tar/oil.
Not sure how much it could a sucked with your messed up seals.
Check for eternal oil leaks, drips on floor etc.
Let it run for a while the smoke should diminish to none.
If, after a good number of miles, it's still smoking, pull the plugs and scrutinize, keeping plugs in order.
You should be okay.
Only other issue might be PCV sucking oil if there's no baffle in the PCV valve cover, to prevent it sucking "splash".
Good luck