i believe the big blocks came from the factory with a sheet metal intake gasket that also functioned as a splash guard for the bottom of the intake.
the 71 manual refers to it as the "one piece intake gasket" and you can see it in the front and rear cutaway views of the engine at the end of the 60th chapter.
what you are referring to as "gaskets on each end of block and ports" the chassis manual calls "rubber manifold seals" and the one piece gasket is placed in addition to the seals.
pg 60-59 with figure 60-73 and pg 60-91 with figure 60-120.
https://www.teambuick.com/reference/...files/60-b.php
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
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