Hello all... I have had a several chevy & ford idi diesels over the last few years. I recently snagged a 6bt swapped truck.. it's a '82 Chevy c30 crew cab dually. It currently has an nv4500 & still has the factory 410s in the Dana 70. The engine came from a 1993 diesel pusher RV but it does have a P-Pump. The RV supposedly had ridiculously low mileage (21k) & I can tell externally that it's much lower mileage than all fo the others that I looked at buying... I have a number of questions... where to begin? (I apologize in advance...feel free to skip any) #1- the truck is parked on an incline right now... after sitting for several days I notice that oil is leaking out of the 4" exhaust at two different joints. Not a ton but more than I would have thought. Should this be a concern? #2- i believe that the engine hasn't been modified... what should I look for to tell? The cover behind the pump with the tamper resistant screw is there & doesn't appear to have been touched. (1 flathead, 1 tamper, 2 hex) I would like to know before beginning any mods myself. #3- what is my best bet for an air filter? Right now it has a crappy k&N style filter elbowed right off of the turbo (which sits lower being an industrial engine). Is cold air intake important? #4- speaking of air... the seller included a intercooler off of a 24 valve truck... I'm not sure if I will have room for that while retaining AC in my 82 chevy? Any suggestions are appreciated... #5- the engine sits close to the radiator so I am limited to slim electric fans... It came with a set but the controller is toast. Any suggestions on a controller? I'd love to have a manual override switch & light inside to see when they are running &/Or turn them on myself if necessary. #6- I suppose this one is dependent on if its actually 100% stock... the truck does leave a decent haze behind when I take off or get on it. Nothing crazy & I'm not bothered by it...just curious if this is normal on a stock truck? #7- I am having trouble with both pump & turbo identification... (maybe because it's from a rv?) The engine tag is also MIA... The last line on the p-pump reads... PES 6P 110 A 120 RS 7213 The turbo states that it is a Holset type 'VH1C' which doesn't show much on google. . Thanks in advance for any responses & advice... very excited to tie up all of the losses ends & begin making improvements to this old girl.