3970010 block casting

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COPO 70 RS/Z28 · #1 05-07-2009, 05:52 PM

was the same physical casting used for all 4 bolt 3970010 applications in 1970. I think that casting # was used for a long time for many different applications but I'm wondering if there is any difference in the casting or machining that would differentiate an LT1 for the others for a feb 70 block??

3970010 350 69 Corvette Late 69, 4 Bolt Main
3970010 302 69 Camaro Z/28, Late 69, 4 Bolt Main
3970010 350 69-79 Truck 2 & 4 Bolt Main
3970010 350 69-79 Pass, Chevelle, Camaro, Nova, Monte Carlo 2 & 4 Bolt Main
3970010 350 70 Corvette 300, 350, 370 HP Bolt Main
3970010 350 71 Corvette 270, 330 HP, 4 Bolt Main
3970010 350 72 Corvette 200, 225 HP, 4 Bolt Main

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