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Old 07-05-18, 08:25PM   #1
low future
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Default over 500 inches from a 389?

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Old 07-05-18, 08:46PM   #2
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Posts: 18,428

Amazing !
The things they hide, the way they spin things, the excuses that they make and the things they omit.
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Old 07-06-18, 12:21PM   #3
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Join Date: Jul 2002
Location: La Jolla , California
Posts: 3,546

Great stuff.
That's a max effort Pontiac for back in the day.
Lots of people never knew.
Other popular stroker combos for the Pontiac then:
370 out to 448" using a 4-3/16" (4.1875")welded stroker crank
421 out to 482" using a 4-3/8" (4.375") " " "
421 could have gone bigger yet .
The large bore block 3.25" main bearing size ,as always,was there to deal with.
Steel & aluminum rods & forged pistons & cams to go with were also available through:
Ansen Equipment & Forgetrue -pistons
Crankshaft Co. -cranks and steel rods
Howard's - solid roller cams,roller lifters & aluminum rods (Howard's is still in business)

So if you find any of that stuff lying around as new old stock in some forgotten storage or barn ..............?
Any used parts like that were probably punished hard.
Step Away From The KOOL AID !
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