Those look like a very nice pair of block huggers, I wonder how the "NO GASKETS" works out?? those definatly are not long tube headers, but they might be fine for you.
They say "use silicone." In my book that IS a gasket. I used to USE silicone when I had headers on the 340 in the old FJ-40 Landcruiser. Used it on the head flanges and the collectors
(I think the reason I did that is because the flanges were slightly off. I had welded Mopar flanges onto a set of "Chivvy" SB headers from Advance Adapter for a Jeep CJ)
