A common clearance issue spot on a stroker is the left rear pan rail (and scraper). Install the pan without a gasket. Spin it over a couple of times. Take it back off and check for rub marks. A ball peen hammer will fix that.
10W-60
oil is pretty heavy. You're wasting a lot of energy moving it around. And putting a lot of strain on the drive mechanism. Don't be too surprised if you shear a distributer gear pin.