Well small story behind this, I got a 7.3L IDIT engine rebuilt at a machine shop in town pretty much 2 years ago and its been outside under cover for a year, well I decided to put it in a truck I got a few months back instead of waiting for my slow working frame off project. Popped off the valve covers expecting a bunch of rust seeing as it wasn't even ran yet, but it looked like it just came out of the machine shop So I got the engine in, filled it with oil and cranked it over with no injectors in it just so I could build oil pressure and make sure the oil pump primed and keep no load on the bearings, got 30 psi oil pressure just cranking it over (figured that's got to be a great sign) and then preceded to put on the rest of the accessories on and prime the fuel system. So problem one, got the coolant in it and the head gaskets seem to be leaking around the rear of the block, will these leaks stop after running the engine and getting up to operating temperature or is there a bigger issue I'm not aware about? I don't think they should be leaking but this is my first engine rebuild and swap. Next is it wasn't blowing any smoke out the exhaust for the first few minutes of running, but now its making smog clouds that look like theres some blue and black and more white too it (hard to tell exactly cause its cold outside and dark), figured not seeing any rust under the valve covers that the cylinders should be rust free also, I may be wrong on this, also with the oil fill cap off its puffing white-ish smoke out, looks like what the 6.9 I just pulled out that has horrible blow by. I have the timing set to 6 degrees at the moment, having a hard time turning it with the injector lines hooked to it, not sure if that's out enough to cause the smoke/smog issue, also I have the wrong flywheel on it as of this moment, its shaking a fair bit so ill have to change it out and try the one off the 6.9. Few other details, the turbo is not on the engine as I'm waiting to figure out what to do with the down pipe, so its just the regular NA exhaust hooked up at the moment. The rad doesn't blow bubbles so I'm guessing the head gasket isn't leaking. The injection pump was swapped over from the old engine as it was working just fine and the injectors are brand new G codes (not remans) with a fresh install kit. Oil pressure is 40ish psi at idle and 15 psi hot idle (just incase that may mean anything), also has a freshly cleaned and tested CDR valve that's hooked up in the NA spot. I'm not sure what to do now, I'm at my wits end with this being a "new" engine and is running worse then the one I just pulled out. I'm also not sure how your supposed to break in a new engine either, I'm hoping that's all it needs and it will stop smoking (or its just smoking cause I have the wrong flywheel on it?) and I'll have a good running engine. Sorry for the long winded post, just trying to make sure I have all the info that may be helpful.