They may have done some work to the cylinder head, but if they did not remove the camshaft towers in order to resurface the head, then they may not have removed the valves & valve springs...which leads me to suppose if they did not remove the springs, then they most likely didn't replace the valve stem seals (a huge time-consuming job if the head is installed on the block). Oil smoking like you described is noticeable while driving especially when decelerating off-throttle when those stem seals are old, brittle & heat baked. New suppple seals will prevent oil in the rocker gallery from migrating down the valve stems into the combustion chambers. If it's smoking all the time & it's not a glycol leak, then it may be what I have suggested. Do you have any of the old parts the engine rebuilder could have replaced. Last cylinder head I had done, the machinist gave me a baggie containing the old stem seals. Proof, if you will.

I'm leaning towards coolant:

white = water/coolant

blue = oil

Edited December 30, 201113 yr by Lyttek