drained the engine block on a 89 jeep 4.0 to refill is should i use the thermostat housing? put coolant in the thermostat hole until it's full? is there another way to fill the block? also i took apart the vacuum system near the air box apart and it seems i'm missing a few lines. if some people with similar years could post pics of there system so i could make sure i have the hoses that would be great take care all