06 F350 KR 4x4 198k miles. Fresh, complete long block installed, coated pistons, studs, new KDD iron heads, all fluids fresh, all sensors replaced with oem Motorcraft, new 6.4 starter, new oem glow plugs and harness,2 new batteries. Originally used the injectors from the previous engine as performance wise it ran well but major blow by/oil leaks prompted the replacement. First start on new engine had some noticeable smoke I attribute to fresh build. Continued to cold start smoke, but goes away after 3 or 4 min. No codes, ficm was replaced several years ago, swapped with my sons truck no change. Clean fresh fuel, new filters, no debris in HCFM, good fuel pressure. Replaced all 8 injectors with current Ford reman from dealer. Same thing. Virtually undrivable when cold until operating temp comes up. Then fine all day long. Starts right up but heavy fuel smell and very heavy smoke. Ideas ?