I ran a alumunim big block 632 on the street and raced for 5 years,I freshened it yearly with now problems,ran 8's in the 1/4 and drive to the track.Then ran a 710 on the street for about 4 months(sold the car)with no problems.
I built it tight gave up a little race preformance,but never had a street problem.An aluminum block move's around alittle,but there's several tricks to using.always let it warm up alittle bit,if you dry sump it,you need to pre oil it before everytime you start it.
They are alittle more pain,but they live well.
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