looks to be several pieces
not just one piece of billet
look at all the welds in the top & valley of the block
$16k wow
speed is expensive,
especially if you want to go really fast
750+hp & go sub 9 seconds in the 1/4 mile
in a MoPar & have it last any period of time at that level
how fast do you want to go ?
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you can get a 500+ cid, proven tried & true, complete race prep 800-900hp BBC
single 4bbl, aftermarket block & great flowing heads for $16k,
632cid 1500hp N/A dyno'd billet with 450cfm heads, complete for about $30k