#11

11-11-2025, 06:33 PM

unruhjonny unruhjonny is offline

Ultimate Warrior

Join Date: May 2004

Location: Calgary, AB, Canada

Posts: 6,835

This is an interesting discussion.

Incase I missed it, does anyone have numbers on the "69-78" cast rods to compare against the other castings being discussed?

I believe this was the first mention of them in this thread:

Quote:

Originally Posted by tom s

For a street only engine up too 4in stroke I would run a set of 69-70 cast rods before any of the 58-62 forged rods.JMHO,Tom

I had understood that the cast rods were good, but this prompted me to look at my McCarthy and other Pontiac books I had here, and I couldn't find a single mention of how the 69-78 rod held up against the others.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.

1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)

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