Jerry Hey wrote:

The p port project slowed down as I got in line at the machine shop.
But my number finally came up and the housings  were bored this
morning.  The throttle bodies are a perfect light interference fit.
I am planning to install them permanently on Thursday.

   Can anyone describe the inner layer of "steel"in the housings.  What
is it and how is it "attached" to the aluminum housing.  I just assumed
that it was chrome all along.    We were worried about it flaking when
we broke through but it did not.       Jerry

It is mechanically locked to the die cast aluminum housings.

Paul Lamar
 
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