Ignorant! That is what I am as far as diesels. I can tear down and rebuild darn near any gas engine - but I quit working on them quite a few years ago (I stopped working for a living). Now - I have the 1993 Tourmaster with the Cummins 8.3 250 hp engine. I do not know what it is. The ONLY papers I have indicates that it is a C 8.3 I have been told this is the Mechanical engine - I assume this means it is strictly a mechanical injector pump system also and the older series (it was built in 3/92). I am planning on nudging the HP up to around 300 - and now have been advised that this can be done (since it is a mechanical) easily. Any thoughts - input - recommendations - experience - etc would be welcomed. I know - Dumb is dumb, stupid is stupid, ignorance is correctable. Put me in the ignorant category. Thanks for your input in advance Bill & Judy (she's the smart one).