Bill - The following is what a quick search showed:

Exhaust manifold - casting # 3835587 = GM Part# 3694164 (see 1st pic for application info)

Intake Manifold - casting # 3835590 = GM Part# 3694163 (see 2nd pic for application info)

This is US info from GM Partswiki. I'm away from home and can't check my Canadian parts book data, but think they will be the same as US for the most part.
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Last edited by Phak1; 12/31/2025 1:23 PM. Reason: Typo
~ Dan
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