I might be wrong but I think there is no 5.7 liter Iron block LSs... chime in as id like to be sure myself.
my response was based on his question on "best" and "available".. in a remote area.
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Not that I'm aware of--and I'm with you on what's most common and therefore a better choice. My response was just a general guideline in response to his question on the range of prices. I'll happily stand corrected by those with more specific knowledge.