[Alvin]

Originally Posted by Bentwheelbob

Alvin - keep drinking the coffee. I appreciate your help.

...runs if at some point last century there may have been a cam swap. It is difficult to imagine why someone would have had the intake and valley pan out otherwise and they were clearly painted while off of the engine. The date codes on the heads are B098 and B038. The intake is L087.

Originally Posted by Alvin

One more for you Bob! A Beautiful restoration.
Note the lack of "insulation foam" to prevent "vapor lock" on the fuel pump to carb fuel line as used by Pontiac.



Image Article http://www.highperformancepontiac.co.../photo_07.html

2 more things come to mind on your car Bob:

1. If you take a look @ your engine bay photo above you can see the remnants of the "insulation foam" sleeve on your car @ the "elbow bend" of your fuel line.

2. A possibility - It was very common to have a intake vacuum leak and/EGR valve plunger plug up with carbon requiring the EGR and sometimes the intake to be removed, Passages cleaned out, and new gaskets installed...