This motor is not compatible with diesel engine parts. As this motor is generally used in smaller GM cars that are a little more than lightweight. You would need a motor for a GM truck to match with diesel parts.
other than special exhaust manifold specifically designed for marine use, the lifter galley on the marine block is teflon coated. an RV type cam is used in marine motors, but those can be changed.
Diesel engine parts are pieces of equipment used to construct a motor that runs on diesel fuel. This should be relatively self-explanatory, given the phrase.
if its not running find TDC on the #1 clyinder, driver side first plug to front remove it, do this by having a friend tap the ignition with your finger or thumb over the hole you will feel pressure...