Maybe someone has some helpful ideas to whats wrong with my 6.2? I picked up a 6.2 from a guy that had pulled it from a military truck and i droped it in my 82 pickup. the old 6.2 had overheated and blown the heads (previous owner) The motor is running but is sluggish and slow compared to other 6.2's it seems to have alot of white smoke going uphill doing 35. It starts really hard in the morning but seems to run fine after it warms up. The glow plug controller was busted so it i replaced it with a manual in cab switch. I dont know if it something like old glow plugs or retarted injection timing. bad injectors or pump. Could it be a leaking head gasket or maybe just a missing wire or something simple. Does anyone have any ideas?