mortrpg

I have an issue with the coolant I tried to do a fluid flush on the 2001 s10 2.3l 4 cyl truck I just bought and I'm getting roughly only 1 gallon of antifreeze out of the system, the crank case is smoking while running there is also small fogginess around the radiator and the sensor is bad on the radiator temperature I just did an oil change and added 1 quart of Lucas oil stabilizer in place of 1 quart of oil right before I found rust in the radiator Also there is a bubbling sound coming from the crank case while running I know it is a high chance it could be a blown or leaking head gasket but I'm looking for alternatives on other possibilities.