I haven't seen a '70 - '74 casting 400 block for sale around here in a looooonnnnggg time. The '60s blocks come up every once in awhile and the later '70s thin wall blocks come up pretty frequently. Maybe these blocks are more plentiful in other areas of the country, but around here they're really rare.
I'd think a $1500 block that's a bit stronger than the factory block would have a market, but that's just based on my own personal experience.
If you could just duplicate the 481988 block but give it a solid lifter gallery and sell it with 4-bolt caps included for less than $1500, I'd think you'd have a winner.
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'72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car!
'73 Firebird 350/4-speed Black on Black, mix & match.
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