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355 4 bolt main block
350 .030 over to 355....
4 bolt main...clearanced...
block is in great shape... oiled... back from a very well known engine shop
300.....
also have other parts as well
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1990 IROC-z28 Convertible ... best et (15.9 @ 86.7)
1970 Chevelle ls5 ... best et (13.97 @ 101.3)
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