10-07-2021, 10:47 AM

66sprint6

Ultimate Warrior

Join Date: Oct 2008

Location: Toronto, ON, Canada

Posts: 1,211

Pushrod length, 1974 400 engine

The engine in our '67 LeMans is a 400 from a 1974 Pontiac. Recently, I had an issue with a rocker arm coming off the stud and the exhaust valve stayed closed. Scared the heck out of me when the engine started running like crap.
I noticed that the pushrod has some scarring now and I was thinking of just replacing them all. But I see two different dimensions: 7.794 and 9.136. I know that I can pull the valve cover and pull one out but I just wanted to see if anyone knows off the top of their head which one is correct.

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