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12559853, 12561706, 12572035, 12572317, 241, 243, 53l, 806, 853, castings, gm, head, heads, ls1, part, springs, valve

<TECH ONLY> GM Head Casting Info

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1FastBrick on Feb 7, 2009

Feb 29, 2024 10:17 AM
by strutaeng

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40

245,867

INTERNAL ENGINE MODIFICATIONS

12561706, 200, 53, 706, 706s, 862, chevy, engine, gm, heads, install, intake, interchange, l59, lm7, valve

862 vs. 706 heads

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Multi-page thread

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old motorhead on Feb 2, 2009

Jun 19, 2017 04:15 PM
by John Gravelle

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365,906

INTERNAL ENGINE MODIFICATIONS

12561706, 48, 53, 706, 862, aluminum, cast, casting, gmc, head, heads, na, on, ported, vs

706vs. 862 heads?

v8 on May 14, 2006

May 19, 2006 07:39 AM
by v8

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GMT 800 & Older GM General Discussion

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