Alright guys sorry for the delay.
I got slammed busy with steering wheels and stuff but I did manage to remove the old gaskets last week and have been testing the new ones I got made up for this manifold.
As you can see from the pic, I melted CYL 3-4-5 pretty badly and the new ones are below the crispy ones.
No leaks to report and things are good to go! Theses new gaskets will ship with the SC Manifold at no added cost! You're WELCOME!
New gaskets are made from FluroSilicone (spelt that wrong possibly) and are rated for about 400* temp and are fuel resistant to degradation.
These suckered aren't cheap on a custom application like this, but will outperform OEM gaskets all day.