427 Casting Number 3935439 Identification Help Needed

Brian

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Jul 31, 2017
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Hello all,

I need help with a 427 I've had for about 20 years. Just getting around to it. I have the block & head casting numbers listed below. Any information would be extremely helpful.

Block = 3935439
Timing Stamp #1 = T0514IR
Timing Stamp #2 = 185419791
Heads = 3904391 (one says GM1T I206 & the other says GM2T J106)

Thanks in advance!
 

tar6569

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Mar 29, 2020
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1968 Chevrolet Impala
That's a 68 corvette 427/435. partial vin is 18S419791
 

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