[70STOVEBOLT]

Diesels are s little different than gas engines. I used plasma rings in my 402 they will break in pretty quickly. Diesels use chrome rings which are hard and need to be broke in under a load. I broke in my rings and my flat tappet hydraulic cam by bringing the RPM up to around 1500 and then alternating between 1500 and 2000 for 15-20 minutes using SAE 30 non-detergent motor oil with a pint of STP oil treatment. I ran it for about another 40 minutes at various speeds on the road and then changed the oil. Refilled with SAE 30 and a pint of STP again for 500 miles then switched to 10W30. I honed the cylinders with a battery powered 19.2 volt drill and a ball hone. So far so good.