Although
almost all of the cars have been converted, originally some
of the early 1600's (up to eng# R-02660; about chassis
number SPL311 - 01400) had a different type rubber insulator
similar to what the 1500's used. To convert to the later
block pictured here, you would need to round up some long
studs which would pass through these blocks and the carb
base. These would either be 5/16 if you have an SAE manifold
or 8mm if you have a metric manifold.
Some
1600's have had 1500 carbs installed which would necessitate
the use of the 1500 insulator blocks.
When
you order the 4 Carb Gasket Set #161-91x4 you get two of
these half inch or so blocks with the 4 gaskets already
glued to them, from Nissan. Sometime back Nissan raised the
price on JUST the 4 gaskets to $84 !
This
way seems a bit more economical!
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