I tried searching on GMpartswiki, but it's hard to make out the correct numbers 3 vs 8 etc. Got no hits on the various combinations I tried. If you can post the number that might help. That manifold has obviously been modified, with that welded on outlet.

Last edited by klhansen; 11/01/2025 8:00 PM.
Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.