MSD distributor 408 stroker

That would do it. Glad you found it. That would be the first thing that I should have thought of.. But I never think of it being that easy. Does the motor have a high volume pump. They make a shaft for that application. The cheaper shafts have that problem. This is the one we used on the last motor that was built with a flat tappet cam. Roller cams use a bronze gear

Milodon Oil Pump Driveshafts 21530