These are probably stupid questions, so please bear with me. I just got a set of headers, do I need to use any rtv or anything on the gaskets? Also, is there a gasket needed between the engine and tranny?

 

No, and no.

 

it's hard to find anything, gasket or sealer to live in the high heat enviroment of headers

 

RTV copper can withstand 700 * of heat. Thats what some of the fourth gen guys are using. This is in conjunction with a real gasket that is.

 

I have never used anything when it comes to sealant or whatnot, just a copper gasket from SCE.

 

Exactly.... there's no need fro sealer on those, of any kind. Use a good quality gasket; the Fel Pro header hadkets, Mr G Ultra-Seal or their copper ones, the copper or aluminum ones from some of the specialty people, etc.; installt hem properly, make sure the bolts are tight, and re-tighten them after a couple of heat-cool cycles. Sealer won't improve anything, and may even create a failure where there isn't one otherwise.

 

Well, you could use Permatex Hylomar or Copper, but you would have to have a reason for it as well as expect to clean up a mess if you ever have to pull it apart again.