I’ll suggest performing a cranking compression test to insure you don’t have a piston ring or other cylinder related issue.  It only takes one cylinder to create a problem.  When doing the cranking compression test, all spark plugs need to be removed and the throttle needs to be blocked to the full open position.  A leak down test will also get the job done.

Lorena, Texas (South of Waco)

BIG TIME THANKS TO ALL OF YOU FOR YOUR INPUT. NEXT WEEK ON TUESDAY,WE ARE DOING A BLEED DOWN TEST WITH 100 PSI OF AIR IN THE CYLINDER. WILL LET ALL KNOW THE RESULTS.

NOT MUCH OIL AT THIS TIME
WE'RE GOING TO DO A BLEED DOWN TEST....PUT 100 PSI OF AIR IN CYLINDER AND GETTING A READING.

I'LL LOOK AND SEE WHAT I CAN SEE,
THANKS

I'LL LOOK AT THIS.
BIG THANKS

BIG THANKS

I agree I think whatever his problem is it is in the head a bad seal or valve guide I doubt if it’s a ring problem

you could also have bad guides on that head.if valve geometry is of they can wear the guides in a hurry.i dont know how bad y blocks are for this.brand x is known for this.just a guess.

Could be the valve stem seals were improperly installed on that side and one or two have shifted  allowing oil down the stem . Pull the valve cover and look at the seals through the springs look to see if they have cracked or moved . If you plugs are clean and toasty most likely the oil is going down the valve stem and not making it into the combustion chamber . its just a guess

I had a overhauled 289 that burned oil on the left bank, It turned out to be the compression rings turned alinging the ends of the rings, but it was very evident in the plugs. I assume you're seeing smoke. How much oil is it using? Are you sure its not water burning, that would be a whiter smoke.