I ve built a few engines like what your wanting. they cost around 20k-22k with all the good stuff add another 2500 for a Dart block..
If you have a 4bolt 010 block just use that up to 650HP
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Superflow 902 Dyno service
3370lb HG prem 10.013@134
358 chev N/A flat tappet cast heads 
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