not these.......
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"..The most common Pontiac connecting rod is the cast unit constructed of Armasteel, a specific iron alloy that boasts some steel-like qualities. While suitable for a mild performance rebuild, entry-level, stock replacement forgings are a much better option, particularly anytime performance is increased beyond stock levels...
...During the 1960s Pontiac introduced a strong cast unit constructed of Armasteel, a GM trade name for a pearlitic malleable iron alloy that possesses some steel-like qualities. Because of age, stability, and durability concerns, I strongly feel that neither of these original Pontiac rods should be used in any high-performance engine.
I knew I heard it somewhere so I had to look it up. My first V8 car was almost a primered 66 GTO with a transplanted 400 and a 4sp. I couldn't push the clutch in!
