ZOERA-SC7XX I run restictors in my shelby motor. .080" holley jets. There is nothing wrong with having the heads flooded to the push rod holes in the manifold as long as you are running a larger than stock
oil pan. The valve springs product alot of heat at rpm going up and down at 40 cycles per second racing and about 10-30 per second cruising the car. As long as you have good valve stem seals ( positive ones) you will not be getting extra
oil sucked in though the head. The valve stem and valve guides also need to be the right clearance. If the clearance is too wide, the stem will wobble and per wear out the seal. This could cause the
oil issue you could have too. Did you heads have any port work done to them? Thin walls between pushrod holes and the ports in the manifold can also give you the same problem but blue smoke should be seen with the car running out the tail pipes. Rick.