Arrow,

Here's what I've been doing sucessfully for more years than I care to count. I do not use the gasket, but I do put a thin coat of RTV on the manifold and tighten up immediately. After 12 hrs (or overnight) I start the engine and bring it up to operting temp, shut it down and immediately re-torque the securing bolts. That little bit of bolt/screw strech the temp produces is taken up when tighten after running the engine. The type of RTV is not too important, as all of them are of a high enough heat tolerance that you don't have to purchase the high-temp stuff. (I'm sure I'll have those who disagree chimming in) If you ever get the chance try to melt some clear, or blue RTV that has been cured, try to. Trust me, it'll take a blow torch and then some to melt it. Point being = if you have any type of RTV, it'll work fine.