Head Gasket Torque

I see that these are the manufacturers suggested torques. My question is that I have read that these manufacturers torques are not tight enough, and that the head gaskets bolts need to be torqued higher. Do you know what the new torque should be? And how would I go about this? Thanks

Scott

1. 1986 Toyota Supra
2. 42000 on new 3.0 liter engine
3. Automatic
4. 2 wheel drive

5. Rough in idle when parked and when moving. Acceleration pedal pressed inwards causes a clanking sound, much like a chain being dragged on the ground.

6. Anti-freeze out the exhaust pipe.

My radiator cap blew, taking the stem with it. I already replaced that with a new pressure release cap. The Anti-freeze problem and rough idle problem are still there, leading me to suspect that I've blown a head gasket, for it blew about a block or so from my house. I drove it home slowly, but I think the Head Gasket metal still warped. My question is, since I don't know the difference between the parts: Do I need to buy a Cylinder Head Gasket Set or just a single Cylinder Head Gasket?

Thank you for the quick response; I appreciate it. As for the testing, all that needs to be done is the re-machining process. Turns out it had been warped, despite the fact it had only been driven home on for about a minute. Is there anyway I can add feedback to your reputation? I know that probably sounds lame that I don't know how to, but I'm relatively new here, and I would like to at least do something in return! . ;