Re: Big Block Chevy Casting # 3999289...Applicatio
Great blocks used in everything from high output engines to trucks. My LS6 bought in 72 from Berger is a 3999289 4 bolt block with numbers:
"3999289 GM 9 T, C 27 72,TO417CRR"
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1971 BFG "Tirebird"
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