It is gonna be hard to hit 10s and keep it a tru daily driver, Now on the other hand... You can go for the full tub out option get there. Please don't do this to a nice body though!
Other than that you are gonna need something that is not normally asperated. i.e blower, nitrous, supercharger etc.
Also be prepaired to put in a 5 point cage, most places won't let you run 10s without it!
I am building my 402 to get me twelves in the 1/4... on street tires. So I may need Nitrous on down the road, but not to much. I think it's cheating too. BUT you know what they say, "If you aint cheatin', you aint tryin' hard enough" Check the Team Chevelle sight that shows "Combos that work", then email a few guys that have hopped up 402s
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have now>>>>> am building
2.73 open 10bolt>>>>>>3.73 posi 12bolt
350>>>>396 w/nitrous
TH350>>>>TH400 (haven't found one yet...)
shooting for 12s in 1/4
college student budget!