Hard to gauge. Some used LS7 blocks, with cracked cylinder walls, are still going for anywhere from $800-$1000. Cracked cylinder walls are all too common for LS7 blocks. I would say the average is about $1000 though. But, with two holes in it, I'd have to start on the low end.....$800-$900.
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'68 C10 swb
'69 Camaro convertible
'72 Chevelle
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