04-15-2020, 04:31 PM
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Ultimate Warrior
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Join Date: Apr 2003
Location: Minneapolis
Posts: 7,938
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The 370hp 428 was standard in an SJ, with a 390hp 428 as an option. You can look at a 1969 GP factory brochure here: http://oldcarbrochures.org/United%20...ure/index.html
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