is there a simple way to determine if the problem is my valve guide seals?
Good way that won't get you dirty................
Find a steep hill and drive down it on no throttle. At ther bottom, rev the engine.
If it then smokes blue, you've got valve seal/guide wear.
Blue smoke when you accelerate is more likely to be rings.
'73 Jensen Interceptor (Resting)
Giant Full Sus Mountain Bike