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Old 08-13-2019, 01:51 PM
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Dick Boneske Dick Boneske is offline
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The "heat chamber" is the heat riser passage in the intake manifold. It does use exhaust gases to heat the manifold and operate the choke.

The '65/'66 intake manifold can be used on all Pontiac V8's through 1979 except the 301, 265 short-deck versions. The heat riser passage and casting recess adjacent to it on the later heads is larger than early heads, so you need the proper year gasket set, which takes care of the mismatch.

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