[Jeff Stout]

Not sure if anyone else ask this. Do you know the tension on oil ring?
The other would be seating the rings. Either on a dyno if in car then maybe get brake pressure as high as you can and run motor in gear as high as you can. If unable to hold in 1st gear try second gear. I had trans brake on my super stocker and it worked well on rebuild. Don't forget to remove rpm chip. Hopefully carb is not leaking when sitting and washing out cylinders.