Fel Pro 1462 header gasket on the driver's side. Just high temp silicone on the passengers side. I also like the TTI header gaskets.
I use the bolts that came w/ the TTI headers.

The reason I use a gasket on the drivers side is b/c the header is sandwiched in there when the motor is dropped in...can't get room to put silicone on it. Much easier for me to just use a gasket.
The passenger's side header will fall out from under the car when you unbolt it. Fairly easy to silicone it and bolt it up.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax