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it is a 69-79 year block idk the exact year, i just ran the csting #. it is 4 bolt main. the crank is steel and balanced. It has keith black high performance pistons.
 
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It depends on what rod's you are using. With what you describe above. If high nickel block, then the rods will be the weakest link. Stock rods vs good I-Beam rods will cause max boost to vary.
 
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