Yes, on the big blocks using the thin gaskets on both side of the valley pan works well. I always use both, this way you will not get any intake or exhaust leaks. I use permatex aviation gasket cement on both side of the thin gaskets and haven't had a leak yet. It's messy doing it, but the aviation cement holds up well.
Using just the valley pan, unless both surfaces are machined clean will most likely leak.
Chrysler only used the valley pan and never used gaskets on there exhaust manifolds either, but they had the advantage of having perfect machined surfaces when putting everything together too.

Mark D.

1968 W200 Sweptline
1969 D100 Utiline
1971 D100 SE Sweptline
1993 D250 Club Cab Sweptline
1986 W250 Cab & Chassis
1978 D300 Sweptline

E. Brookfield, Massachusetts