TH350 inspection cover.

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Royal Sierra 454

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1976
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15 GMC Royal Sierra
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454
On TH350 transmission cast aluminum cover there are 2 threaded holes. What is the purpose for them? Are they for a skid plate?
 

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idahovette

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Perry
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350
Support rods from the engine to the cover?
 

Craig 85

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There are strut braces that run from those holes to triangular plates that mount to the engine at the motor mounts.
 

Royal Sierra 454

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What year Squarebody K5 used them? My 1976 didn't seem to have them.
 

nvrenuf

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Most had them starting around ’78.
 

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