C15 Camshaft problems?

Had a shop replace the flaking camshaft of my '04 MBN C15. When I ordered the reman #130-9710 (800 HP marine for the 3406, and also used in the 700 HP military C18; I received instead a 10R7155, which I was told is a new cam instead of reman, (Do not know if the part # changed due to an update, or because of change from reman to new.)

Camshaft was installed by ex Cat tech, now independent, running his own shop. Very good wrench, however usually installs the identical part # that he removes; (i.e. no experience installing an other than stock cam in an MBN motor which is stock except for a 550 flash, and 5232 inj. codes, which should't be no problem).
Truck ran great in shop parking lot, however when I left bobtailing, the engine "stumbled" bad between 1000-1300 RPM, while throwing lots of whitish (fuel?) smoke out the exhaust. Above and below this RPM, engine sounds, and runs fantastic, with no white smoke. WTH?
Mechanic is puzzled; He stated that another truck had similar symptoms whenever cam was a tooth off, wondering if cam should have been installed at different setting, or maybe if overhead setting should be different from stock?
Should not affect anything, but due to the flaking, one exhaust rocker, and all six injector rockers were also replaced.

Can anybody help with this?.......Thanks in advance.

 

Wish someone could help me with this....
Different mechanic suggested R & R crank sensor and cam sensor, even though no code/faults logged.

 

Thanks for the combacks, fellows.

DDS, I'm home now, will have to contact him, and ask about setting the timing calibration. Beings I am totally ignorant on this, would the setting be different than if the replacement cam were stock?
In case he did set the calibration, your thoughts please, on the other techs suggestion to R&R the crank, and cam sensors.
Once again, many thanks.

 

Have not found the problem as of yet, mechanic that did the install went back over his work for a second time, then asked his #1 help to double check; no problem found.
Brought the truck over to local Cat shop, they hooked up the computer, did tests, everything appears OK. The tech there pointed out that the miss was not only in the 1000-1300 range; if the engine was held at a steady speed, it periodically stumbled, no noticeable smoke in shop or parking lot, bobtailing down the road the white smoke would "boil out" of the pipes, for some reason more evident 1000-1300 RPM, maybe because this is my shift range, and I'm holding engine speed there. Traveling at 55mph, around 1400 RPM in 12 gear it will stumble, with the white smoke, but once again doesn't seem as bad as the 1000-1300 RPM stumble.

Techs at local Cat suggested bringing it to Houston TX, where Mustang Cat has a dyno, & local tech commented that the dyno would pinpoint the problem. Called Mustang, they really don't want to put it on the dyno until problem is found, and suggested I bring it back to shop that did the install. I watched these guys check, and recheck, and feel like they really tried. I'm going in circles, starting to consider a flare gun, and opening the fuel tanks.......
DDS, can't remember if I asked about the fuel pressure, fairly sure it was not checked with a gauge, but would a fuel pressure test be automatically performed when Cat was hooked to it checking all the other stuff?
Once again, I'm asking because of my ignorance about this stuff, but is the "calibration of timing" something that should be done whenever a cam is swapped? The techs over here feel that it isn't necessary because the sensors weren't removed, and they are positioned in a place that makes it unlikely to be bumped.