Help!!!!! no compression in motor

[jfrank133]

Hello, a while back my head gaskets on my 305 went out, so instead of paying someone that knows what thier doing, I decided to go the cheap route and do it myself. What I did not know was that the heads were suppose to be torque down. Now I know. Now here I am with a little more knowledge, however my question is, now that I have to do the heads again do I have to take everything out, like the intake maifold to correctly torque down the heads and do i need to do anything else so it will work properly. please help me out.